[[!comment format=mdwn
 username="http://smcv.pseudorandom.co.uk/"
 nickname="smcv"
 subject="comment 1"
 date="2013-09-10T10:01:22Z"
 content="""
In the git plugin, it's usually the local part (the part before the @)
of the email address (as in `git config user.email`).
See `parse_diff_tree()` in `IkiWiki/Plugin/git.pm`.
"""]]