remove trailing white-spaces from app/models/issue_priority.rb.
remove trailing white-spaces from app/helpers/boards_helper.rb.
remove trailing white-spaces from app/helpers/calendars_helper.rb.
remove trailing white-spaces from app/helpers/account_helper.rb.
remove trailing white-spaces from app/helpers/admin_helper.rb.
remove trailing white-spaces from app/helpers/attachments_helper.rb.
remove trailing white-spaces from app/helpers/auth_sources_helper.rb.
remove trailing white-spaces from app/models/board.rb.
remove trailing white-spaces from app/models/comment.rb.
remove trailing white-spaces from app/models/comment_observer.rb.
