* test/lib/minitest/unit.rb: Show leakes threads and tempfiles.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46089 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* class.c: [DOC] Fixed grammar and examples of instance_methods.
  By @alex-frost via documenting-ruby/ruby#31 [ci skip]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46090 b2dd03c8-39d4-4d8f-98ff-823fe69b080e