remove trailing white-spaces from app/models/comment.rb.
remove trailing white-spaces from app/models/comment_observer.rb.
Rails3: replace deprecated 'before_create' method at User model.
remove trailing white-spaces from app/models/group.rb.
remove trailing white-spaces from app/models/auth_source.rb.
remove trailing white-spaces from app/helpers/issue_relations_helper.rb.
remove trailing white-spaces from app/helpers/issue_statuses_helper.rb.
remove trailing white-spaces from app/helpers/journals_helper.rb.
remove trailing white-spaces from app/models/wiki.rb.
remove trailing white-spaces from app/models/wiki_content_observer.rb.
