convert: Using --dest-type svn crashed, if the source repo used tags. The convert extension requires puttags(self, tags) to return a sequence for a multi-variable assignment. If puttags implicitly returns None, the code will break when trying to un-pack None for assignment.

commands: use round parenthesis in 'hg head --active' help This is the style used in the rest of the help strings.

graphlog: mark --branch as incompatible with --graph The --only-branch option was deprecated in 0d5f139b23c1 and --branch was added instead. But the graphlog extension was not updated to match the change.