convert: write "repository" instead of "repo"
We should strive to avoid slang in our messages to the users.
minirst: add margin around definition items
This greatly improves the output of 'hg help env'.
mq: only highlight/label patch name for qseries.
Restore the behaviour introduced in
e37e9904bf10, which was
accidentally removed when labelling was introduced in
717c35d55fb3.