if command name is quoted on mswin32. [ruby-dev:28400] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10000 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7227 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e