Fixes#1775 (Drop support for Rubinius)
I am amazed how many hacks we've had just to support Rubinius. It feels good to
be able to remove them and reduce the complexity of the codebase.
* Add Pry::Platform.known_engines
* Add fixes for rbx-3.86, and cleanup .travis.yml
* Optionally skip a test on specific Ruby engine(s).
And tag specs that currently do not pass on Rubinius.
Travis takes much longer to complete after this change.
Maybe there are switches we can pass to speed up Rubinius,
or this will improve on new versions of Rubinius.
Platform is a category module that adds utility functions for querying
platform information relating to Pry.
Some methods are moved from BaseHelpers, and for backwards compatibility
included via 'include Pry::Platform'.
module_function is not used by BaseHelpers anymore, in favour of
include/extend being used in its place.
There is also less indentation noise in BaseHelpers module.
With _pry_.h (available on the backup master branch) these methods
exist on a single module that doesn't pollute the command scope, although
for backwards compatibility we still include the functions as top-level
command functions.
