win32: VT100 escape
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35907 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32: VT100 escape
[ruby-core:44958] [Feature #6418]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35907 b2dd03c8-39d4-4d8f-98ff-823fe69b080e