fix plugin generator script name of USAGE on Rails3. git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.0-stable@10288 e93f8b46-1217-0410-a6f0-8f06a7374b81
git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9528 e93f8b46-1217-0410-a6f0-8f06a7374b81
git-svn-id: http://redmine.rubyforge.org/svn/trunk@1786 e93f8b46-1217-0410-a6f0-8f06a7374b81