### master

#### Features

* Added metadata to the gem (such as changelog URI, source code URI & bug
  tracker URI), so it shows on https://rubygems.org/gems/pry
  ([#1869](https://github.com/pry/pry/pull/1869))
* Added ability to forward ARGV to a Pry session via `--` (or `-`) when
  launching Pry from shell
  ([#1902](https://github.com/pry/pry/commit/5cd65d3c0eb053f6edcdf571eea5d0cd990626ed))

#### API changes

* `Pry::Prompt` is a class now and it can be instantiated to create new prompts
  on the fly that are not registered with `Pry::Prompt#add`. Learn more about
  its API in the docs ([#1877](https://github.com/pry/pry/pull/1877))

#### Deprecations

* Deprecated `Pry.config.exception_whitelist` in favor of
  `Pry.config.unrescued_exceptions`
  ([#1874](https://github.com/pry/pry/pull/1874))
* Deprecated `Pry.config.prompt = Pry::Prompt[:simple][:value]` in favor of
  `Pry.config.prompt = Pry::Prompt[:simple]` when setting Pry prompt via
  `pryrc`. `Pry::Prompt[:simple]` would return an instance of `Pry::Prompt`
  instead of `Hash` ([#1877](https://github.com/pry/pry/pull/1877))
* Deprecated setting prompt via an array of two procs:
  ([#1877](https://github.com/pry/pry/pull/1877))

  ```ruby
  # Deprecated, emits a warning.
  Pry.config.prompt = [proc {}, proc {}]
  ```

  This will be removed in the next release.
* Deprecated the `show-doc` command. The `show-source -d` is the new recommended
  way of reading docs ([#1934](https://github.com/pry/pry/pull/1934))
* Deprecated `Pry::Command#_pry_`. Use `Pry::Command#pry_instance` instead
  ([#1989](https://github.com/pry/pry/pull/1989))

#### Breaking changes

* Deleted deprecated `Pry::Platform`
  ([#1863](https://github.com/pry/pry/pull/1863))
* Deleted deprecated `Pry#{input/output}_array`
  ([#1884](https://github.com/pry/pry/pull/1864))
* Deleted deprecated `Pry::Prompt::MAP`
  ([#1866](https://github.com/pry/pry/pull/1866))
* Deleted deprecated methods of `Pry::Helpers::BaseHelpers` such as `mac_osx?`,
  `linux?`, `windows?`, `windows_ansi?`, `jruby?`, `jruby_19?`, `mri?`,
  `mri_19?`, `mri_2?` ([#1867](https://github.com/pry/pry/pull/1867))
* Deleted deprecated `Pry::Command#text`
  ([#1865](https://github.com/pry/pry/pull/1865))
* Deleted deprecated `Pry::Method#all_from_common`
  ([#1868](https://github.com/pry/pry/pull/1868))
* Deleted `install-command` ([#1979](https://github.com/pry/pry/pull/1979))
* Deleted `Pry::Helpers::BaseHelpers#command_dependencies_met?`
  ([#1979](https://github.com/pry/pry/pull/1979))
* Deleted commands: `gem-cd`, `gem-install`, `gem-list`, `gem-open`,
  `gem-readme`, `gem-search`, `gem-stats`
  ([#1981](https://github.com/pry/pry/pull/1981))

#### Bug fixes

* Fixed bug where using `Pry.config.prompt_name` can return a
  `Pry::Config::Lazy` instead of expected instance of `String`
  ([#1890](https://github.com/pry/pry/commit/c8f23b3464d596c08922dc923c64bb57488e6227))
* Fixed `LoadError` being raised when using auto completions and Bundler
  ([#1896](https://github.com/pry/pry/commit/85850f47e074fe01f93e5cb7d561e7c2de7aede9))
* Fixed bug where `Pry.input_ring` doesn't append duplicate elements
  ([#1898](https://github.com/pry/pry/pull/1898))
* Fixed Ruby 2.6 warning about `Binding#source_location`
  ([#1904](https://github.com/pry/pry/pull/1904))

### [v0.12.2][v0.12.2] (November 12, 2018)

#### Bug fixes

* Restore removed deprecations, which were removed by accident due to a bad
  rebase.

### [v0.12.1][v0.12.1] (November 12, 2018)

#### Bug fixes

* Stopped creating a new hash each time `Pry::Prompt#[]` is invoked
  ([#1855](https://github.com/pry/pry/pull/1855))
* Fixed `less` pager not working when it's available
  ([#1861](https://github.com/pry/pry/pull/1861))

### [v0.12.0][v0.12.0] (November 5, 2018)

#### Major changes

* Dropped support for Rubinius ([#1785](https://github.com/pry/pry/pull/1785))

#### Features

* Added a new command, `clear-screen`, that clears the content of the screen Pry
  is running in regardless of platform (Windows or UNIX-like)
  ([#1723](https://github.com/pry/pry/pull/1723))
* Added a new command, `gem-stat`, that prints gem statistics such as gem
  dependencies and downloads ([#1707](https://github.com/pry/pry/pull/1707))
* Added support for nested exceptions for the `wtf` command
  ([#1791](https://github.com/pry/pry/pull/1791))
* Added support for dynamic prompt names
  ([#1833](https://github.com/pry/pry/pull/1833))

  ```rb
  # pryrc
  Pry.config.prompt_name = Pry.lazy { rand(100) }

  # Session
  [1] 80(main)>
  [2] 87(main)>
  [3] 30(main)>
  ```
* Added support for XDG Base Directory Specification
  ([#1609](https://github.com/pry/pry/pull/1609),
  [#1844](https://github.com/pry/pry/pull/1844),
  ([#1848](https://github.com/pry/pry/pull/1848)))
* Removed the `simple-prompt`. Use `change-prompt simple` instead. The
  `list-prompt` command was removed and embedded as `change-prompt --list`
  ([#1849](https://github.com/pry/pry/pull/1849))

#### API changes

* The following methods started accepting the new optional `config` parameter
  ([#1809](https://github.com/pry/pry/pull/1809)):
  * `Pry::Helpers.tablify(things, line_length, config = Pry.config)`
  * `Pry::Helpers.tablify_or_one_line(heading, things, config = Pry.config)`
  * `Pry::Helpers.tablify_to_screen_width(things, options, config = Pry.config)`
  * `Pry::Helpers::Table.new(items, args, config = Pry.config)`

  You are expected to pass a session-local `_pry_.config` instead of the global
  one.

* Added new method `Pry::Config.assign`, for creating a Config non-recursively
  ([#1725](https://github.com/pry/pry/issues/1725))
* Added `Pry.lazy`, which is a helper method for values that need to be
  calculated dynamically. Currently, only `config.prompt_name` supports it
  ([#1833](https://github.com/pry/pry/pull/1833))
* `Pry::Prompt` responds to `.[]`, `.all` & `.add` now. The `Pry::Prompt.add`
  method must be used for implementing custom prompts. See the API in the
  documentation for the class ([#1846](https://github.com/pry/pry/pull/1846))

#### Breaking changes

* Deleted the `Pry::Helpers::Text.bright_default` alias for
  `Pry::Helpers::Text.bold` ([#1795](https://github.com/pry/pry/pull/1795))
* `Pry::Helpers.tablify_to_screen_width(things, options, config = Pry.config)`
  requires `options` or `nil` in place of them.
* `Pry::Helpers::Table.new(items, args, config = Pry.config)` requires `args`
  or `nil` in place of them.
* Completely revamped `Pry::HistoryArray`
  ([#1818](https://github.com/pry/pry/pull/1818)).
  * It's been renamed to `Pry::Ring`
    ([#1817](https://github.com/pry/pry/pull/1817))
  * The implementation has changed and as result, the following methods were
    removed:
    * `Pry::Ring#length` (use `Pry::Ring#count` instead)
    * `#empty?`, `#each`, `#inspect`, `#pop!`, `#to_h`
  * To access old Enumerable methods convert the ring to Array with `#to_a`
  * Fixed indexing for elements (e.g. `_pry_.input_ring[0]` always return some
    element and not `nil`)
* Renamed `Pry.config.prompt_safe_objects` to `Pry.config.prompt_safe_contexts`
* Removed deprecated `Pry::CommandSet#before_command` &
  `Pry::CommandSet#after_command` ([#1838](https://github.com/pry/pry/pull/1838))

#### Deprecations

* Deprecated `_pry_.input_array` & `_pry_.output_array` in favour of
  `_pry_.input_ring` & `_pry_.output_ring` respectively
  ([#1814](https://github.com/pry/pry/pull/1814))
* Deprecated `Pry::Command#text`. Please use `#black`, `#white`, etc. directly
  instead (as you would with helper functions from `BaseHelpers` and
  `CommandHelpers`) ([#1701](https://github.com/pry/pry/pull/1701))
* Deprecated `_pry_.input_array` & `_pry_.output_array` in favour of
  `_pry_.input_ring` and `_pry_.output_ring` respectively
  ([#1817](https://github.com/pry/pry/pull/1817))
* Deprecated `Pry::Platform`. Use `Pry::Helpers::Platform` instead. Note that
  `Pry::Helpers::BaseHelpers` still includes the `Platform` methods but emits a
  warning. You must switch to `Pry::Helpers::Platform` in your code
  ([#1838](https://github.com/pry/pry/pull/1838),
  ([#1845](https://github.com/pry/pry/pull/1845)))
* Deprecated `Pry::Prompt::MAP`. You should use `Pry::Prompt.all` instead to
  access the same map ([#1846](https://github.com/pry/pry/pull/1846))

#### Bug fixes

* Fixed a bug where `cd Hash.new` reported `self` as an instance of Pry::Config
  in the prompt ([#1725](https://github.com/pry/pry/pull/1725))
* Silenced the `Could not find files for the given pattern(s)` error message
  coming from `where` on Windows, when `less` or another pager is not installed
  ([#1767](https://github.com/pry/pry/pull/1767))
* Fixed possible double loading of Pry plugins' `cli.rb` on Ruby (>= 2.4) due to
  [the `realpath` changes while invoking
  `require`](https://bugs.ruby-lang.org/issues/10222)
  ([#1762](https://github.com/pry/pry/pull/1762),
  [#1774](https://github.com/pry/pry/pull/1762))
* Fixed `NoMethodError` on code objects that have a comment but no source when
  invoking `show-source` ([#1779](https://github.com/pry/pry/pull/1779))
* Fixed `negative argument (ArgumentError)` upon pasting code with tabs, which
  used to confuse automatic indentation
  ([#1771](https://github.com/pry/pry/pull/1771))
* Fixed Pry not being able to load history on Ruby 2.4.4+ when it contains the
  null character ([#1789](https://github.com/pry/pry/pull/1789))
* Fixed Pry raising errors on `cd`'ing into some objects that redefine
  `method_missing` and `respond_to?`
  ([#1811](https://github.com/pry/pry/pull/1811))
* Fixed bug when indentation leaves parts of input after pressing enter when
  Readline is enabled with mode indicators for vi mode
  ([#1813](https://github.com/pry/pry/pull/1813),
  [#1820](https://github.com/pry/pry/pull/1820),
  [#1825](https://github.com/pry/pry/pull/1825))
* Fixed `edit` not writing to history
  ([#1749](https://github.com/pry/pry/issues/1749))

#### Other changes

* Deprecated the `Data` constant to match Ruby 2.5 in the `ls` command
  ([#1731](https://github.com/pry/pry/pull/1731))

### 0.11.3

#### Features

* Add Pry::Testable, an improved modular replacement for PryTestHelpers.
  **breaking change**.

See pull request [#1679](https://github.com/pry/pry/pull/1679).

* Add a new category module: "Pry::Platform". Loosely related to #1668 below.

See pull request [#1670](https://github.com/pry/pry/pull/1670)

* Add `mac_osx?` and `linux?` utility functions to Pry::Helpers::BaseHelpers.

See pull request [#1668](https://github.com/pry/pry/pull/1668).

* Add utility functions for drawing colorised text on a colorised background.

See pull request [#1673](https://github.com/pry/pry/pull/1673).

#### Bug fixes

* Fix a case of infinite recursion in `Pry::Method::WeirdMethodLocator#find_method_in_superclass`
  that users of the [Hanami](http://hanamirb.org/) web framework experienced and
  reported since 2015.

See pull request [#1689](https://github.com/pry/pry/pull/1689).

* Fix a bug where Method objects were not returned for setters inherited
  from a default (Pry::Config::Default). Eg, this is no longer an error:

      pry(main)> d = Pry::Config.from_hash({}, Pry::Config::Default.new)
      pry(main)> d.method(:exception_whitelist=) # Error

See pull request [#1688](https://github.com/pry/pry/pull/1688).

* Do not capture unused Proc objects in Text helper methods `no_color` and `no_paging`,
  for performance reasons. Improve the documentation of both methods.

See pull request [#1691](https://github.com/pry/pry/pull/1691).

* Fix `String#pp` output color.

See pull request [#1674](https://github.com/pry/pry/pull/1674).


### 0.11.0

* Add alias 'whereami[?!]+' for 'whereami' command. ([#1597](https://github.com/pry/pry/pull/1597))
* Improve Ruby 2.4 support ([#1611](https://github.com/pry/pry/pull/1611)):
  * Deprecated constants are hidden from `ls` output by default, use the `-d` switch to see them.
  * Fix warnings that originate in Pry while using the repl.
* Improve completion speed in large applications. ([#1588](https://github.com/pry/pry/pull/1588))
* Pry::ColorPrinter.pp: add `newline` argument and pass it on to PP. ([#1603](https://github.com/pry/pry/pull/1603))
* Use `less` or system pager pager on MS Windows if it is available. ([#1512](https://github.com/pry/pry/pull/1512))
* Add `Pry.configure` as an alternative to the current way of changing configuration options in `.pryrc` files. ([#1502](https://github.com/pry/pry/pull/1502))
* Add `Pry::Config::Behavior#eager_load!` to add a possible workaround for issues like ([#1501](https://github.com/pry/pry/issues/1501))
* Remove Slop as a runtime dependency by vendoring v3.4 as Pry::Slop.
  People can depend on Slop v4 and Pry at the same time without running into version conflicts. ([#1497](https://github.com/pry/pry/issues/1497))
* Fix auto-indentation of code that uses a single-line rescue ([#1450](https://github.com/pry/pry/issues/1450))
* Remove "Pry::Config#refresh", please use "Pry::Config#clear" instead.
* Defining a method called "ls" no longer breaks the "ls" command ([#1407](https://github.com/pry/pry/issues/1407))
* Don't raise when directory permissions don't allow file expansion ([#1432](https://github.com/pry/pry/issues/1432))
* Syntax highlight <tt> tags in documentation output.
* Add support for BasicObject subclasses who implement their own #inspect (#1341)
* Fix 'include RSpec::Matchers' at the top-level (#1277)
* Add 'gem-readme' command, prints the README file bundled with a rubygem
* Add 'gem-search' command, searches for a gem with the rubygems.org HTTP API
* Fixed bug in the `cat` command where it was impossible to use line numbers with files ([#1349](https://github.com/pry/pry/issues/1349))
* Fixed uncaught Errno::EOPNOTSUPP exception when $stdout is a socket ([#1352](https://github.com/pry/pry/issues/1352))
* Display a warning when you cd'ed inside a C object and executed 'show-source' without arguments ([#691](https://github.com/pry/pry/issues/691))
* Make the stagger_output method more reliable by reusing possibly available Pry instance ([#1364](https://github.com/pry/pry/pull/1364))
* Make the 'gem-install' message less confusing by removing backticks ([#1350](https://github.com/pry/pry/pull/1350))
* Fixed error when Pry was trying to load incompatible versions of plugins ([#1312](https://github.com/pry/pry/issues/1312))
* Fixed bug when `hist --clear` led to ArgumentError ([#1340](https://github.com/pry/pry/pull/1340))
* Fixed the "uninitialized constant Pry::ObjectPath::StringScanner" exception during autocomplete ([#1330](https://github.com/pry/pry/issues/1330))
* Secured usage of colours with special characters (RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE) in Pry::Helpers::Text ([#493](https://github.com/pry/pry/issues/493#issuecomment-39232771))
* Fixed regression with `pry -e` when it messes the terminal ([#1387](https://github.com/pry/pry/issues/1387))
* Fixed regression with space prefixes of expressions ([#1369](https://github.com/pry/pry/issues/1369))
* Introduced the new way to define hooks for commands (with `Pry.hooks.add_hook("{before,after}_commandName")`). The old way is deprecated, but still supported (with `Pry.commands.{before,after}_command`) ([#651](https://github.com/pry/pry/issues/651))
* Removed old API's using `Pry::Hooks.from_hash` altogether
* Removed hints on Foreman support (see [this](https://github.com/ddollar/foreman/pull/536))
* Fixed support for the tee command ([#1334](https://github.com/pry/pry/issues/1334))
* Implemented support for CDPATH for ShellCommand ([#1433](https://github.com/pry/pry/issues/1433), [#1434](https://github.com/pry/pry/issues/1434))
* `Pry::CLI.parse_options` does not start Pry anymore ([#1393](https://github.com/pry/pry/pull/1393))
* The gem uses CPU-less platforms for Windows now ([#1410](https://github.com/pry/pry/pull/1410))
* Add `Pry::Config::Memoization` to make it easier to implement your own `Pry::Config::Default` class.([#1503](https://github.com/pry/pry/pull/1503/))
* Lazy load the config defaults for `Pry.config.history` and `Pry.config.gist`.

### 0.10.1

* Fix bugs with jruby
* Move to rspec for testing (from bacon)
* Clean up ruby warnings

### 0.10.0

#### Features
* Added a `watch` command that lets you see how values change over time.
* Added an experimental `Pry.auto_resize!` method
  * Makes Pry notice that your window has resized and tell Readline about it
  * Fixes various bugs with command history after a window resize
  * Off by default, but can be called from your `.pryrc` if you're brave
* `play` now has an `-e`/`--expression` flag
  * Evaluates until the end of the first valid expression
* History gets appended to `~/.pry_history` after every input, not just at quit
* Return values render with more accurate syntax highlighting
* Return values start rendering immediately and stream into the pager
* User can override `.pryrc` location by setting `$PRYRC` env var (#893)
* User can whitelist objects whose inspect output should appear in prompt (#885)
  * See `Pry.config.prompt_safe_objects`
* `whereami` is now aliased to `@`
* Added  arguments to `whereami`:
  * `-m` shows the surrounding method
  * `-c` shows the surrounding class
  * `-f` shows the entire file
* Lazy load configuration values (Pry.config). (#1096)
* Defer requiring `readline` until Pry is started for the first time. (#1117)
* Add option to disable input completer through `_pry_.config.completer = nil`
* Add `list-prompts` command. (#1175)
  * Lists the available prompts available for use.
* Add `change-prompt` command. (#1175)
  * Switches the current prompt, by name.
* Add `list-inspectors` command. (#1176)
  * Lists the inspectors available to print Ruby return values.
* Add `change-inspector` command. (#1176)
  * Switches the current inspector, by name.
* Add `show-source -e`. (#1185)
  * Evaluate the given Ruby expression and show the source of its return value.
* Add `Pry.config.windows_console_warning`(#1218)
  * Windows JRuby users who don't want warnings about ansicon can set
    `Pry.config.windows_console_warning = false`.
* Add arguments to `play` command.
  * `-p` prints the code before playing it.
  * `-e` allows you to play expressions from your session.
* Add `cd -` to switch to the previous binding.
* Allow prying into frozen objects.

#### Dependency changes

* Remove dependency on `ffi` gem on JRuby ([#1158](https://github.com/pry/pry/issues/1158))
* Remove optional dependency on Bond ([#1166](https://github.com/pry/pry/issues/1166))
  * Bond support has been extracted to the `pry-bond` plugin
* Remove dependency on `openstruct` ([#1096](https://github.com/pry/pry/issues/1096))
* Drop support for Ruby 1.8.7 (0.9.12.x will continue to be available)
* Add support for Ruby 2.1
* Require Coderay `~> 1.1.0`
* Remove deprecated hooks API ([#1209](https://github.com/pry/pry/pull/1209))
* Add 64-bit windows support.

#### Bug fixes, etc.
* The `gem-install` command can require gems like `net-ssh` thanks to better
  logic for guessing what path to require. (#1188)
* `toggle-color` command toggles the local `_pry_.color` setting instead of the
  global `Pry.color`.
* Update `Pry::CLIPPED_PRINT` to include a hex representation of object ID when
  printing a return value. (#1162)
* Wrap exceptions in a proxy instead of adding singleton methods. (#1145)
  * `Pry#last_exception=` now supports exception objects that have been frozen.
* `binding.pry` inside `.pryrc` file now works, with some limitations (@richo / #1118)
* Add support for BasicObjects to `ls` (#984)
* Allow `ls -c <anything>` (#891)
* Fix indentation not working if the `mathn` stdlib was loaded (#872)
* Fix `hist`'s `--exclude-pry` switch (#874)
* Fix `gem-install` on JRuby (#870)
* Fix source lookup for instrumented classes (#923)
* Improved thread safety when multiple instances are running (#944)
* Make `edit` ignore `-n`/`--no-reload` flag and `disable_auto_reload` config
  in cases where the user was editing a tempfile
* Make `gem-cd` use the most recent gem, not the oldest
* Make `install-command` honor `.gemrc` switches (#666)
* Make `hist` with no parameters show just the current session's history (#205)
  * `hist --all` shows older history
* Make `-s`/`--super` flag of `show-source`/`show-doc` work when method name is
  being inferred from context (#877)
* Rename `--installed-plugins` flag to `--plugins`
* Strip ANSI codes from prompt before measuring length for indentation (#493)
* Fix bug in `edit` regarding recognition of file names without suffix.
* Reduced download size by removing tests etc. from distributed gem.

#### Dev-facing changes
* `CommandSet#commands`, sometimes referenced through `Pry.commands.commands`,
  renamed to `CommandSet#to_hash`. It returns a duplicate of the internal hash
  a CommandSet uses.
* `CommandSet#keys` is now an alias of `CommandSet#list_commands`.
* All commands should now reference configuration values via `_pry_.config`
  (local) and not `Pry.config` (global). (#1096)
  * This change improves support for concurrent environments and
    context-specific Pry sessions. `_pry_.config` inherits default values from
    `Pry.config` but can override them locally.
* `rake pry` now accepts switches prefixed with `_` (e.g., `rake pry _v`)
* Pagers now act like `IO`s and accept streaming output
  * See `_pry_.pager.page` and `_pry_.pager.open`.
* The `Pry` class has been broken up into two smaller classes.
  * `Pry` represents non-UI-specific session state, including the eval string
  * `Pry::REPL` controls the user-facing interface
  * This should make it easier to drive Pry from alternative interfaces
  * `Pry.start` now has a `:driver` option that defaults to `Pry::REPL`
  * This involved a lot of refactoring and may break plugins that depend on
    the old layout
* Add `ColorPrinter` subclass of `PP` for colorized object inspection
* Add `[]` and `[]=` methods to `CommandSet`, which find and replace commands
  * Example: `Pry.commands["help"] = MyHelpCommand`
* The completion API has been refactored (see fdb703a8de4ef3)
* `Pry.config.input_stack` (and the input stack concept in general) no longer
  exists
* There's a new `Pry::Terminal` class that implements a number of different
  methods of determining the terminal's dimensions
* Add `ReplTester` class for high-level simulation of Pry sessions in tests
* Add `Pry.main`. Returns the special instance of Object referenced by self of
  `TOPLEVEL_BINDING`: "main".
* Changed second argument of `Pry.view_clip()` from Fixnum to Hash to support
  returning a string with or without a hex representation of object ID. (#1162)
* The `output` and `pager` objects will now strip color-codes, so commands should
  always print in color.
* Commands now have a `state` hash that is persistent across invocations of the command
  in the same pry session.

### 0.9.12.6 (2014/01/28)
* Don't fail if Bond is not installed (#1106)

### 0.9.12.5 (2014/01/27)
* Fix early readline errors by deferring require of readline (#1081, #1095)

### 0.9.12.4 (2013/11/23)
* Fix issue with Coderay colors being black, even when on a black background (#1016)

### 0.9.12.3 (2013/09/11)
* Bump Coderay dependency (#987)
* Fix consecutive newlines in heredocs being collapsed (#962)
* Fix pager not working in JRuby > 1.7.5 (#992)

### 0.9.12.2 (2013/05/10)
* Make `reload-code` with no args reload "current" file (#920)

### 0.9.12.1 (2013/04/21)
* Add workaround for JRuby crashing bug (#890)
  * Related to http://jira.codehaus.org/browse/JRUBY-7114

### 0.9.12 (2013/02/12)
#### Features
* `pry --gem` (see 19bfc13aa)
* `show-source` now works on commands created with `create_command`
* `whereami` now has `-m` (method), `-c` (class), and `-f` (file) options
* `show-source` now falls back to superclass (and displays warning) if it
  can't find class code
* `show-source`/`show-doc` now indicate when `-a` option is available

#### Bug fixes, etc.
* Fix commands breaking due to Slop looking at `ARGV` instead of command
  parameters (#828)
* Fix pager breaking in some situations (#845)
* Fix broken rendering of some docs (#795)
* Silence warnings during failed tab-completion attempts
* Fix broken prompt when prompt is colored (#822 / #823)
* Added `reload-method` as alias for `reload-code` (for backwards
  compatibility)
* Reopen `Readline.output` if it is not a tty (see 1538bc0990)

### 0.9.11.4 (2013/01/20)
* Fix pager not rendering color codes in some circumstances
* Add `Pry.last_internal_error`, useful for devs debugging commands

### 0.9.11.3 (2013/01/17)
* Fix `Pry.run_command`
* Improve `ls` output
* Add `:requires_gem => "jist"` to `gist` command (so dependencies can be
  installed via `install-command`)
* Improve help for `edit` command

### 0.9.11.2 (2013/01/16)
* Fix minor bug in `gist` on Windows: rescue `Jist::ClipboardError` rather
  than letting the scary error spill out to users and potentially having them
  think the gist didn't post.

### 0.9.11.1 (2013/01/16)
* Fix minor bug in `gist` command where I neglected to remove
  a call to a non-existent method (`no_arg`) which was called when
  `gist` is invoked with no parameters

### 0.9.11 (2013/01/16)
#### Dependency changes
* Upgrade `slop` to `~> 3.4`
* New optional dependency: `bond`
  * You'll need to perform `gem install bond`
  * It improves autocompletion if you use Readline
  * Does not work for libedit
    (More info: https://github.com/pry/pry/wiki/FAQ#wiki-readline)
  * Big thanks to cldwalker

#### Features
* Basic Ruby 2.0 support (#738)
* JRuby 1.7.0+ support (#732)
* New `reload-code` command
  * Reload code for methods, classes, commands, objects and so on
  * Examples: `reload-code MyClass`, `reload-code my_method`,
    `reload-code my_obj`
* Bond tab completion (see "Dependency changes")
* Consolidate "show" commands into `show-source`
  * `show-source` can now extract source for:
    * Classes
    * Methods
    * Procs
    * Pry commands
    * Arbitrary objects (it shows the source for the class of the object)
  * As a result, `show-command` is now removed
* `gist`, `play`, and `save-file` now infer object type without requiring flags
  * Examples: `play MyClass`, `play my_file.rb`, `play my_method`
* Consolidate editing commands into `edit`
  * `edit` can now edit:
    * Files
    * Methods
    * Classes
    * Pry commands
  * As a result, `edit-method` is now removed
  * Examples: `edit MyClass`, `edit my_file.rb`, `edit my_method`
* `amend-line` and `play` now properly indent code added to input buffer
* Support for multiple require switches (`pry -rubygems -r./a.rb`) (#674)
* Support for multiple exec switches (`pry -e ':one' -e ':two'`)
* Ability to customize the name displayed in the prompt (#695)
* `--patch` switch for `edit --ex` command (#716)
* Respect the `$PAGER` environment variable (#736)
* `disable-pry` command (#497)
* Two new hooks, `before_eval` and `after_eval`
* Tab completion for `Array#<tab>` in `show-source` and `show-doc`
* `gem-install` immediately requires gems
* `-l` switch for `ls` command (displays local variables)
* `gem-open` command
* `fix-indent` command
* Subcommands API
* Public test API for plugin writers (see d1489a)
* Tabular `ls` output
* `--no-line-numbers` switch for `whereami` command
* `--lines` switch for `play` command

#### Bug fixes, etc.
* Use single escape instead of double in `find-method` (#652)
* Fix blank string delimiters (#657)
* Fix unwanted `binding_impl_method` local in scratch bindings (#622)
* Fix `edit-method -p` changing constant lookup (#645)
* Fix `.pryrc` loading twice when invoked from `$HOME` directory (#682)
* Fix Pry not remembering initial `pwd` (#675)
* Fix multiline object coloring (#717)
* Fix `show-method` not supporting `String::new` notation (#719)
* Fix `whereami` command not showing correct line numbers (#754)
* Fix buggy Cucumber AST output (#751)
* Fix `while/until do` loops indentation (#787)
* Fix `--no-plugins` switch (#526)
* Ensure all errors go to the error handler (#774)
* Fix `.pryrc` loading with wrong `__FILE__`
* Fix pager not working if `less` is not available
* Fix `^D` in nested REPL
* Many small improvements to error message clarity and documentation formatting

### 0.9.10 (2012/07/04)
#### Dependency changes
* Upgrade `slop` to version 3 (#561)
* Switch from `gist` gem to `jist` (#590)
* Upgrade `method_source` to 0.8

#### Features
* Add `--hist`, `-o` and `-k` flags to `gist` command (#572)
* Support `show-source`/`show-doc` on methods defined in `class_eval` (#584)
* Support `show-source`/`show-doc` on gem methods defined in C (#585)
* Add `--disable-plugin` and `--select-plugin` options (#596)
* Allow `cd -` to switch between bindings (#597)
* Add `Pry.config.should_load_local_rc` to turn off `./.pryrc` (#612)
* Allow running a file of Pry input with `pry <file>`
* Support colours in `ri` command
* Add `before_eval` hook
* The prompt proc now gets a lot more data when its arity is 1

#### Bug fixes, etc.
* Removed the `req` command (#554)
* Fix rendering bugs when starting Pry (#567)
* Fix `Array#pretty_print` on Jruby (#568)
* Fix `edit` on Windows (#575)
* Fix `find-method` in the presence of badly behaved objects (#576)
* Fix `whereami` in ERb files on Rails (#580)
* Raise fewer exceptions while tab completing (#632)
* Don't immediately quit Pry when an error happens in Readline (#605)
* Support for `ansicon` to give JRuby Windows users colour (#606)
* Massive speed improvements to `show-source` for modules (#613)
* Improve `whereami` command when not in a `binding.pry` (#620)
* Support embedded documents (`=begin` ... `=end`) (#622)
* Support editing files with spaces in the name (#627)
* Renamed `__binding_impl__` to `__pry__`
* Support for absolute paths in `$EDITOR`
* Fix `cat` command on files with unknown extensions
* Many, many internal refactorings and tidyings

### 0.9.9.6 (2012/05/09)
* Fix `ZeroDivisionError` in `correct_indentation` (#558)

### 0.9.9.5 (2012/05/09)
* Fix `ZeroDivisionError` in `correct_indentation` (#558)
* Fix double highlighting in RDoc (#562)
* Automatically create configuration for plugins (#548)

### 0.9.9.4 (2012/04/26)
* Fix `NoMethodError: undefined method `winsize' for #<IO:<STDOUT>>` (#549)
* Fixes for JRuby
* Fix syntax error on `exit` (550)
* Heredoc content no longer auto-indented

### 0.9.9.3 (2012/04/19)
* Fix `show-doc` failing on some core classes, like `Bignum`

### 0.9.9.2 (2012/04/18)
* Make `correct_indentation`'s auto-colorization respect `Pry.color`

### 0.9.9.1 (2012/04/18)
* Clear up confusion in `show-source`/`show-doc` docs
  * `-a` switch applies to classes as well as modules

### 0.9.9 (2012/04/18)
#### New features
* Lines of input are syntax highlighted upon Enter keypress
* `show-source` command can now show class/module source code
  * Use `-a` to see all monkeypatches
  * Hard dependency on `ruby18_source_location` gem in MRI 1.8
* `show-doc` command can now show class/module docs
  * Use `-a` to see docs for all monkeypatches
  * Hard dependency on `ruby18_source_location` gem in MRI 1.8
* New `find-method` command
  * Performs a recursive search in a namespace for the existence of methods
  * Can find methods whose names match a regex or methods which contain
    provided code
  * This command is like a ruby-aware `grep`, very cool (thanks swarley)
* [`pry-coolline`](https://github.com/pry/pry-coolline) now works properly
* `alias_command` method now much more powerful
  * Example: `alias_command "lM", "ls -M"`
* `whereami` is now more intelligent
  * Automatically shows entire source code of current method if current
    context is a method (thanks robgleeson)
* New `raise-up` command
  * Allows you to raise an exception that will bubble out of pry (ending the
    session) and escape into enclosing program

#### Bug fixes, etc.
* Fixed crash when paging under Windows
* Lines ending with `\` are incomplete (kudos to fowl)
* `edit-method -n` no longer blocks (thanks misfo)
* Show instance methods of modules by default in `ls`
* Docs for REPL-defined methods can now be displayed using `show-doc`
* Autoload `ruby18_source_location` on MRI 1.8, when available
  * See https://github.com/conradirwin/ruby18_source_location
* Tab completion should work on first line now (historic bug fixed)
* `:quiet => true` option added to `Pry.start`, turns off `whereami`
* Another easter egg added
* Show unloaded constants in yellow for `ls`
* Improved documentation for `Pry.config` options
* Improved auto-indentation
* JRuby: heuristics used to clean up `ls` output
  * Fewer internal methods polluting output

### 0.9.8.4 (2012/6/3)
* ~/.pry_history wasn't being created (if it did not exist)! FIXED
* `hist --save` saved colors! FIXED
* added Pry#add_sticky_local API for adding sticky locals to individual pry instances

### 0.9.8.3 (2012/3/2)
* various tweaks to improve rbx support
* commands now support optional block arguments
* much improved help command
* updated method_source dependency
* added wtf command
* jruby should now work in windows (though without color)

### 0.9.8.2 (2012/2/9)
* fixed bugs related to --super
* upgraded slop dependency
* added edit -c (edit current line)
* edit now respects Pry.config.disable_autoreload option

### 0.9.8.1 (2012/1/30)
* fixed broken --no-plugins option
* Ensure ARGV is not mutated during option parsing.
* Use a more rbx-friendly test for unicodeness
* Use rbx-{18,19}mode as indicated  http://about.travis-ci.org/docs/user/languages/ruby/
* Don't explode in gem-list [Fixes #453, #454]
* Check for command-name collision on assignment [Fixes #450]

### 0.9.8 (2012/1/25)

MAJOR NEW FEATURES
- upgraded command api, https://github.com/pry/pry/wiki/Custom-commands
- added a system of hooks for customizing pry behaviour
- changed syntax checking to use eval() for improved accuracy
- added save-file command
- added gist command (removed gist-method, new gist command is more general)

complete CHANGELOG:
* CommandError's no longer cause the current input to be discarded
* Better syntax highlighting for rbx code code
* added cat --in to show pry input history
* prefixed temporary file names with 'pry'
* show-doc now supports -l and -b options (line numbers)
* play now supports -i and -d options
* moved UserCommandAPI command-set to pry-developer_tools plugin
* added :when_started event for hooks, called in Pry.start
* added a man page
* added rename method to Pry::CommandSet (commands can be renamed)
* added CommandSet#{before_command,after_command} for enhancing builtin commands
* added checking for namespace collisions with pry commands, set Pry.config.collision_warning
* work around namespace collisions by ensuring lines starting with a space are executed as
* ruby.work around namespace collisions by pressuring lines starting with a space are executed as ruby
* added handlers for Ctrl+C (SIGINT) on jruby, these are now caught as in other ruby versions
* removed dependency on ruby_parser
* prevented colours leaking across the pry prompt
* fixed edge cases in Pry::Method, for methods with crazy names and methods that have been 'undef'd
* refactored history handling code for clarity and correctness
* added Pry::WrappedModule as a counterpart to Pry::Method
* made a trailing , cause pry to wait for further input
* removed gist-method command, added gist command
* added pry-backtrace command to show history of current session
* fixed whereami within 'super' methods
* replaced inline version guards by Pry::Helpers::BaseHelpers.{rbx?,jruby?,windows?} etc.
* removed the CommandProcessor, its functionality is part of the new Command class
* changed cd .. at the top level so it doesn't quit pry.
* changed edit-command to no-longer need a command set argument
* fixed empty lines so that they don't replace _ by nil
* fixed SyntaxErrors at the REPL level so they don't replace _ex_.

### 0.9.7.4 (2011/11/5)
* ls -M now works in modules (bugfix)
* added exception message for bad cd object/path
* no longer die when encounter exceptions in .pryrc
* baked in CoolLine support
* Pry.config.input in .pryrc now respected

### 0.9.7.3 (2011/10/28)
* really fixed indentation for 'super if' and friends
* Fixed indentation for tmux
* added Pry.config.correct_indent option (to toggle whether indentation
* corrected optional param behaviour for method signatures: e.g Signature meth(param1=?, param2=?)

### 0.9.7.2 (2011/10/27)
* fixed indentation for 'super if' and 'ensure', 'next if', etc
* refactored Pry#run_command so it can accept an eval_string parameter (so amend-line and so on can work with it)
* changed ^D so it no longer resets indent level automatically

### 0.9.7.1 (2011/10/26)
* fixed gem dependency issues

### 0.9.7 (2011/10/25)

MAJOR NEW FEATURES:
- upgraded ls command to have a more intuitive interface
- added automatic indentation (thanks YorickPeterse!)
- added Pry::Method wrapper class to encapsulate method-related functionality

complete CHANGELOG:
* fixed syntax highlighting for object literals
* fixed ActiveSupport method-naming conflict with "in?"
* added --super option to edit-method, show-method, and friends -  making it easier to operate on superclass methods
* officially added edit --in to open previous expressions in an editor
* whereami now works for REPL-defined code
* started using JRuby parser for input validation in JRuby (thanks pangloss!)
* fixed bug where ~/.pryrc could be loaded more than once (thanks kelseyjudson!)
* added parse_options! helper to pull option parsing out of commands
* Pry now respects the terminal's input encoding
* moved some requires out of the startup process for improved speed
* added input_array info to DEFAULT_PROMPT, e.g [1] pry(main)>
* added --no-history option to pry binary (prevent history being LOADED, history will still be saved)

### 0.9.6.2 (2011/9/27)
* downgrading to CodeRay 0.9.8 due to problems with 1.0 and rails (autoloading problem) see #280 on pry and #6 on CodeRay
* also added (as a minor feature) cirwin's implementation of edit --in
* added early break/exit for objectpath errors (the 'cd 34/@hello/bad_path/23')

### 0.9.6 (2011/9/19)
* restored previous behavior of command-line switches (allowing "-rfilename")
* removed -p option (--play) from edit command
* `edit` with no arguments now edits the current or most recent expression
* `edit` auto-reloads .rb files (need to specify -n to suppress)
* added -p option (--patch) to edit-method command, which allows
    monkeypatching methods without touching the original file
* edit-method can now edit REPL-defined methods
* cat --ex now works on exceptions in REPL-defined code
* play -m now uses eval_string.replace()
* play -m --open uses show-input to show play'd code
* added "unindent" helper to make adding help to commands easier
* local ./.pryrc now loaded after ~/.pryrc if it exists
* cat --ex N and edit --ex N now can navigate through backtrace, where cat --ex (with no args) moves through successive levels of the backtrace automatically with state stored on the exception object itself
* new option Pry.config.exception_window_size determines window size for cat --ex
* input_stack now implemented - pushing objects onto a pry instance's input_stack causes the instance to read from those objects in turn as it encounters EOF on the previous object. On finishing the input_stack the input object for the pry instance is set back to Pry.config.input, if this fails, pry breaks out of the REPL (throw(:breakout)) with an error message
* Pry.config.system() defines how pry runs system commands
* now injecting target_self method into command scope
* play now performs 'show-input' always unless eval_string contains a valid expression (i.e it's about to be eval'd)
* play and hist --replay now push the current input object onto the input_stack before redirecting input to a StringIO (works much better with pry-remote now)

### 0.9.5 (2011/9/8)

MAJOR NEW FEATURES:
- JRuby support, including show-method/edit-method and editor integration on both 1.8 and 1.9 versions
- extended cd syntax: cd ../@x/y
- play command now works much better with _in_ array (this is a very powerful feature, esp with Pry::NAV_PROMPT)
- history saving/loading is now lightning fast
- 'edit' (entered by itself) now opens current lines in input buffer in an editor, and evals on exit
- 'edit' command is also, in general more intelligent
- ls output no longer in array format, and colors can be configured, e.g: Pry.config.ls.ivar_color = :bright_blue
- new switch-to command for moving around the binding stack without exiting out of sessions
- more sophisticated prompts, Pry::NAV_PROMPT to ease deep spelunking of code
- major bug fix for windows systems
- much better support for huge objects, should no longer hang pry (see #245)
- cat --ex and edit --ex now work better

complete CHANGELOG:
* tempfile should end in .rb (for edit -t)
* ls output should not be in array format
* fix history saving (should not save all of Readline::HISTORY, but only what changed)
* prevent blank lines going to Readline::HISTORY (thanks cirwin!)
* ensure that cat --ex emulates the `whereami` format - includes line numbers and formatted the same, etc
* fixed bug #200 ( https://github.com/pry/pry/issues/200 )- string interpolation bug (thanks to ryanf)
* show-doc and stat now display method visibility (update WIKI)
* got rid of warnings caused by stricter ruby 1.9.3 rules
* remove interpolation of command names and fix interpolation error message (update WIKI) (thanks ryanf!)
* 'nested sessions' now use binding stacks (so each instance manages its own collection of bindings without spawning other instances)
* 'cd ..' just pops a binding off the binding_stack with special behaviour when only one binding in stack - it breaks out of the repl loop
* added switch-to command (like jump-to but doesn't unwind the stack)
* show-method and show-doc now accept multiple method names
* control_d hook added (Pry.config.control_d_handler)
* behaviour of ^d is now to break out of current expr if in multi-line expr, or break out of current context if nested, or break out of pry repl loop if at top-level
* can no longer interpolate command name itself e.g #{x}-#{y} where x = "show" and y = "doc"
* ^C no longer captured
* got rid of Pry.active_instance, Pry.last_exception and friends.
* also special locals now shared among bindings in a pry instance (i.e _ex_ (and friends) re-injected into new binding entered with 'cd')
* renamed inp and out to _in_ and _out_ (to avoid collisions with actual locals in debugging scope)
* added third parameter to prompts, the pry instance itself (_pry) see https://github.com/pry/pry/issues/233 for why it's important
* cd behaviour when no args performs the same as `cd /`
* commands with keep_retval can now return nil (to suppress output now return 'void' instead)
* Pry::CommandProcessor::Result introduced
* Pry.view_clip() modified to be more robust and properly display Class#name
* edit command when invoked with no args now works like edit -t
* when edit is invoked (with no args or with -t) inside a multi-line expression input buffer, it dumps that buffer into a temp file and takes you to it
* got rid of Pry#null_input? since all that was needed was eval_string.empty?
* cd command now supports complex syntax: cd ../@y/y/../z
* JRuby is no longer a 2nd class citizen, almost full JRuby support, passing 100% tests
* added Pry::NAV_PROMPT (great new navigation prompt, per robgleeson) and Pry::SIMPLE_PRINT for simple (IRB-style) print output (just using inspect)
* _pry_ now passed as 3rd parameter to :before_session hook
* ls colors now configurable via Pry.config.ls.local_var_color = :bright_red etc
* ls separator configurable via, e.g Pry.config.ls.separator = "  "
* Pry.view_clip() now only calls inspect on a few immediates, otherwise uses the #<> syntax, which has been truncated further to exclude teh mem address, again related to #245

### 0.9.3 (2011/7/27)
* cat --ex (cats 5 lines above and below line in file where exception was raised)
* edit --ex (edits line in file where exception was raised)
* edit -t (opens a temporary file and evals it in current context when closed)
* `pry -r` requires now happen after plugin loading (so as not to interfere with
* new Pry.config.disable_auto_reload option, for turning off auto reloading by edit-method and related (thanks ryanf)
* add better error messages for `cd` command
* fixed exotic object regression - BasicObject.new etc now return "=> unknown"
* added reload-method command (reloads the associated file of a method)
* converted: import => import-set, version => pry-version, install => install-command
* Pry.config.command_prefix support (thanks ryanf!)
* fixed indentation for simple-prompt
* hist command now excludes last line of input (the command invocation itself)
* hist now has `history` alias
* missing plugins no longer raise exception, just print a warning to $stderr
* fixed jedit editor support

### 0.9.2 (2011/6/21)
* fixed string interpolation bug (caused valid ruby code not to execute, sorry!)
* fixed `ls` command, so it can properly display members of Object and classes, and BasicObject, etc
* added a few git related commands to experimental command set, blame and diff

### 0.9.0 (2011/6/17)
* plugin system
* regex commands
* show-method works on methods defined in REPL
* new command system/API
* rubinius core support
* more backports to ruby 1.8
* inp/out special locals
* _ex_ backtrace navigation object (_ex_.line, _ex_.file)
* readline history saving/loading
* prompt stack
* more hooks
* amend-line
* play
* show-input
* edit
* much more comprehensive test suite
* support for new and old rubygems API
* changed -s behaviour of ls (now excludes Object methods)
* removed eval-file, lls, lcd, and a few other commands


### 0.7.6.1 (2011/3/26)
* added slightly better support for YARD
* now @param and @return tags are colored green and markdown `code` is syntax highlighted using coderay

### 0.7.6 (2011/3/26)
* `whereami` command now accepts parameter AROUND, to display AROUND lines on eitherside of invocation line.
* made it so `whereami` is invoked even if no method exists in current context (i.e in rspec tests)
* added rubinius support for `whereami` invocation in HOOKS by checking for __unknown__.rb rather than just <main>

### 0.7.0 (2011/3/15)
* add pry-doc support with syntax highlighting for docs
* add 'mj' option to ls (restrict to singleton methods)
* add _ex_ local to hold last exception raised in an exception

### 0.6.8 (2011/3/6)
* add whereami command, a la the `ir_b` gem
* make whereami run at the start of every session
* make .pryrc be loaded by run-time pry sessions

### 0.6.7 (2011/3/4)
* color support
* --simple-prompt for pry commandline
* -I mode for pry commandline
* --color mode for pry commandline
* clean up requires (put them all in one place)
* simple-prompt command and toggle-color command.

### 0.6.3 (2011/2/28)
* Using MethodSource 0.3.4 so 1.8 show-method support provided
* `Set` class added to list of classes that are inspected

### 0.6.1 (2011/2/26)
* !@ command alias for exit_all
* `cd /` for breaking out to pry top level (jump-to 0)
* made `-e` option work in a more effective way for `pry` command line invocation
* exit and exit-all commands now accept a parameter, this parameter becomes the return value of repl()
* `command` method from CommandBase now accepts a :keep_retval arg that determines if command value is returned to pry session or just `nil` (`nil` was old behaviour)
* tests for new :keep_retval and exit-all/exit behaviour; :keep_retval will remain undocumented.

### 0.5.8 (2011/2/22)
* Added -c (context) option to show-doc, show-methods and eval-file
* Fixed up ordering issue of -c and -r parameters to command line pry

### 0.5.7 (2011/2/21)
* Added pry executable, auto-loads .pryrc in user's home directory, if it
	exists.

### 0.5.5 (2011/2/19)
* Added Pry.run_command
* More useful error messages
* Easter eggs (game and cohen-poem)

### 0.5.0 (2011/2/17)
* Use clipped version of Pry.view() for large objects
* Exit Pry session on ^d
* Use Shellwords for breaking up parameters to pry commands
* Use OptionParser to parse options for default pry commands
* Add version command
* Refactor 'status' command: add current method info
* Add meth_name_from_binding utility lambda to commands.rb
* Add -M, -m, -v(erbose), -a(ll), -s(uper), -l(ocals), -i(ivars), -k(klass
	vars), etc options to ls
* add -M(instance method) options to show-method and show-doc
* add --help option to most commands
* Get rid of ls_method and ls_imethods (subsumed by more powerful ls)
* Get rid of show_idoc and show_imethod
* Add special eval-file command that evals target file in current context

### 0.4.5 (2011/1/27)
* fixed show_method (though fragile as it references __binding_impl__
	directly, making a name change to that method difficult

### 0.4.4 (2011/1/27)
* oops, added examples/ directory

### 0.4.3 (2011/1/26)
* added alias_command and desc methods to Pry::CommandBase
* changed behaviour of ls_methods and ls_imethods to return sorted lists
	of methods

### 0.4.1 (2011/1/23)
* made it so a 'def meth;end' in an object Pry session defines singleton
	methods, not methods on the class (except in the case of
	immediates)
* reorganized documentation, moving customization to a separate wiki file
* storing wiki in a nested git repo, as github wiki pages have their own
	repo
* added more tests for new method definition behaviour

### 0.4.0 (2011/1/21)
* added command API
* added many new commands, i.e ls_methods and friends
* modified other commands
* now accepts greater customization, can modify: input, output, hooks,
	prompt, print object
* added tab completion (even completes commands)
* added extensive tests
* added examples
* many more changes

### 0.1.3 (2010/12/9)
* Got rid of rubygems dependency, refactored some code.

### 0.1.2 (2010/12/8)
* now rescuing SyntaxError as well as Racc::Parser error in valid_expression?

### 0.1.0 (2010/12/8)
* release!

[v0.12.0]: https://github.com/pry/pry/releases/tag/v0.12.0
[v0.12.1]: https://github.com/pry/pry/releases/tag/v0.12.1
[v0.12.2]: https://github.com/pry/pry/releases/tag/v0.12.2