commands: remove ineffective parenthesis

mercurial/commands.py

@@ -239,7 +239,7 b' def backout(ui, repo, node=None, rev=Non'
     commit_opts['addremove'] = False
     if not commit_opts['message'] and not commit_opts['logfile']:
         # we don't translate commit messages
-        commit_opts['message'] = "Backed out changeset %s" % (short(node))
+        commit_opts['message'] = "Backed out changeset %s" % short(node)
         commit_opts['force_editor'] = True
     commit(ui, repo, **commit_opts)
     def nice(node):