* lib/reine.rb, lib/reline/*: Reline is a readline stdlib compatible
library.
* lib/readline.rb: Readline uses a fallback to Reline when ext/readline
doesn't exist.
* tool/sync_default_gems.rb: add ruby/reline as a default gem.
* appveyor.yml: add "set RELINE_TEST_ENCODING=Windows-31J" for test suit
of Reline, and add "--exclude readline" to "nmake test-all" on Visual
Studio builds because of strange behavior.
* spec/ruby/library/readline/spec_helper.rb: skip Reline as with
RbReadline.
* Other ruby implementations use the spec/ruby directory.
[Misc #13792] [ruby-core:82287]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e