It seems that with the current mercurial commit code, it will always
blindly overwrite the current file with the web edited version, losing
any other changes.
+* `rcs_commit_staged`, `rcs_rename`, `rcs_remove`, and `rcs_diff` are not
+ implemented for mercurial, and so attachments, remove and rename plugins
+ and recentchangesdiff cannot be used with it. (These should be fairly
+ easy to add..)
Posthook: in `$srcdir/.hg/hgrc`, I have the following