* tool/redmine-backporter.rb: fixed bug of background color.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45135 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* tool/redmine-backporter.rb: should add the value after checking error.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45136 b2dd03c8-39d4-4d8f-98ff-823fe69b080e