rubocop: enable the Style/FrozenStringLiteralComment cop

This will greatly ease Pry support on Ruby 3.0 (when it's out).

.rubocop.yml

@@ -71,3 +71,9 @@ Gemspec/RequiredRubyVersion:
 
 Style/ModuleFunction:
   Enabled: false
+
+Style/FrozenStringLiteralComment:
+  Enabled: true
+  EnforcedStyle: always
+  Exclude:
+    - 'spec/fixtures/example_nesting.rb'

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 gemspec
 

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rake/clean'
 require 'rubygems/package_task'
 

bin/pry

@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 $0 = 'pry'
 
 require 'pry'

lib/pry.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pry/version'
 require 'pry/last_exception'
 require 'pry/forwardable'

lib/pry/basic_object.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class BasicObject < BasicObject
     [:Kernel, :File, :Dir, :LoadError, :ENV, :Pry].each do |constant|

lib/pry/block_command.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # A super-class for Commands that are created with a single block.
   #

lib/pry/class_command.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # A super-class of Commands with structure.
   #

lib/pry/cli.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'stringio'
 
 class Pry

lib/pry/code.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'method_source'
 
 class Pry

lib/pry/code/code_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'method_source'
 
 class Pry

lib/pry/code/code_range.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Code
     # Represents a range of lines in a code listing.

lib/pry/code/loc.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Code
     # Represents a line of code (which may, in fact, contain multiple lines if

lib/pry/code_object.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # This class is responsible for taking a string (identifying a
   # command/class/method/etc) and returning the relevant type of object.

lib/pry/color_printer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'pp'
 require 'English'
 

lib/pry/command.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'delegate'
 require 'shellwords'
 

lib/pry/command_set.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class NoCommandError < StandardError
     def initialize(match, owner)

lib/pry/command_state.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'ostruct'
 
 class Pry

lib/pry/commands/amend_line.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class AmendLine < Pry::ClassCommand

lib/pry/commands/bang.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Bang < Pry::ClassCommand

lib/pry/commands/bang_pry.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class BangPry < Pry::ClassCommand

lib/pry/commands/cat.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cat < Pry::ClassCommand

lib/pry/commands/cat/abstract_formatter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cat

lib/pry/commands/cat/exception_formatter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cat

lib/pry/commands/cat/file_formatter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cat

lib/pry/commands/cat/input_expression_formatter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cat

lib/pry/commands/cd.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Cd < Pry::ClassCommand

lib/pry/commands/change_inspector.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ChangeInspector < Pry::ClassCommand

lib/pry/commands/change_prompt.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ChangePrompt < Pry::ClassCommand

lib/pry/commands/clear_screen.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ClearScreen < Pry::ClassCommand

lib/pry/commands/code_collector.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class CodeCollector

lib/pry/commands/disable_pry.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class DisablePry < Pry::ClassCommand

lib/pry/commands/easter_eggs.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   Pry::Commands.instance_eval do
     command(%r{!s/(.*?)/(.*?)}, "") do |source, dest|

lib/pry/commands/edit.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Edit < Pry::ClassCommand

lib/pry/commands/edit/exception_patcher.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Edit

lib/pry/commands/edit/file_and_line_locator.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Edit

lib/pry/commands/exit.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Exit < Pry::ClassCommand

lib/pry/commands/exit_all.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ExitAll < Pry::ClassCommand

lib/pry/commands/exit_program.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ExitProgram < Pry::ClassCommand

lib/pry/commands/find_method.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class FindMethod < Pry::ClassCommand

lib/pry/commands/fix_indent.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class FixIndent < Pry::ClassCommand

lib/pry/commands/help.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Help < Pry::ClassCommand

lib/pry/commands/hist.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Hist < Pry::ClassCommand

lib/pry/commands/import_set.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ImportSet < Pry::ClassCommand

lib/pry/commands/jump_to.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class JumpTo < Pry::ClassCommand

lib/pry/commands/list_inspectors.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ListInspectors < Pry::ClassCommand

lib/pry/commands/ls.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/constants.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/formatter.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/globals.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/grep.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/instance_vars.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/interrogatable.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/jruby_hacks.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/local_names.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/local_vars.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/ls_entity.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/methods.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/methods_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/ls/self_methods.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Ls < Pry::ClassCommand

lib/pry/commands/nesting.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Nesting < Pry::ClassCommand

lib/pry/commands/play.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Play < Pry::ClassCommand

lib/pry/commands/pry_backtrace.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class PryBacktrace < Pry::ClassCommand

lib/pry/commands/pry_version.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Version < Pry::ClassCommand

lib/pry/commands/raise_up.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # N.B. using a regular expresion here so that "raise-up 'foo'" does the right thing.
   class Command

lib/pry/commands/reload_code.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ReloadCode < Pry::ClassCommand

lib/pry/commands/reset.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Reset < Pry::ClassCommand

lib/pry/commands/ri.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'stringio'
 
 class Pry

lib/pry/commands/save_file.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class SaveFile < Pry::ClassCommand

lib/pry/commands/shell_command.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShellCommand < Pry::ClassCommand

lib/pry/commands/shell_mode.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShellMode < Pry::ClassCommand

lib/pry/commands/show_doc.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShowDoc < Command::ShowInfo

lib/pry/commands/show_info.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShowInfo < Pry::ClassCommand

lib/pry/commands/show_input.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShowInput < Pry::ClassCommand

lib/pry/commands/show_source.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ShowSource < Command::ShowInfo

lib/pry/commands/stat.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Stat < Pry::ClassCommand

lib/pry/commands/switch_to.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class SwitchTo < Pry::ClassCommand

lib/pry/commands/toggle_color.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class ToggleColor < Pry::ClassCommand

lib/pry/commands/watch_expression.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class WatchExpression < Pry::ClassCommand

lib/pry/commands/watch_expression/expression.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class WatchExpression

lib/pry/commands/whereami.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'method_source'
 
 class Pry

lib/pry/commands/wtf.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Command
     class Wtf < Pry::ClassCommand

lib/pry/config.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'ostruct'
 
 class Pry

lib/pry/config/attributable.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Config
     # Attributable provides the ability to create "attribute"

lib/pry/config/lazy_value.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Config
     # LazyValue is a Proc (block) wrapper. It is meant to be used as a

lib/pry/config/memoized_value.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Config
     # MemoizedValue is a Proc (block) wrapper. It is meant to be used as a

lib/pry/config/value.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   class Config
     # Value holds a value for the given attribute and decides how it should

lib/pry/control_d_handler.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # @api private
   # @since ?.?.?

lib/pry/core_extensions.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # @return [Array] Code of the method used when implementing Pry's
   #   __binding__, along with line indication to be used with instance_eval (and

lib/pry/editor.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'shellwords'
 
 class Pry

lib/pry/exception_handler.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # @api private
   # @since ?.?.?

lib/pry/exceptions.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   # As a REPL, we often want to catch any unexpected exceptions that may have
   # been raised; however we don't want to go overboard and prevent the user

lib/pry/forwardable.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   module Forwardable
     require 'forwardable'

lib/pry/helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "pry/helpers/base_helpers"
 require "pry/helpers/options_helpers"
 require "pry/helpers/command_helpers"

lib/pry/helpers/base_helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   module Helpers
     module BaseHelpers

lib/pry/helpers/command_helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'tempfile'
 
 class Pry

lib/pry/helpers/documentation_helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   module Helpers
     # This class contains methods useful for extracting

lib/pry/helpers/options_helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   module Helpers
     module OptionsHelpers

lib/pry/helpers/platform.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rbconfig'
 
 class Pry

lib/pry/helpers/table.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Pry
   module Helpers
     def self.tablify_or_one_line(heading, things, config = Pry.config)