This extensions allows you to edit commit messages for all applied mq patches in one go.
This extension is not distributed with Mercurial.
Author: aragost Trifork ag
The extension works by that the user is just editing one file, then the extension parses these edits, pop the applied patches and then for each previously applied patch push it and refresh it with the new commit message
Configure your .hgrc to enable the extension by adding following lines:
[extensions] editcommitmsgs = /path/to/editcommitmsgs/editcommitmsgs.py