check-code: add a rule against a GNU sed-ism
BSD sed requires the 'i' command to be followed with a backslash and a
newline, like so:
$ sed -e '/^@/i\
> other'
We've encountered this problem before, e.g. in test-mq.t (
900767dfa80d).
This change adds a check-code rule and fixes two instances of the
problem in test-record.t.
hgweb: make help verbose again (
issue3899)
Due to regression introduced in
f5db3092790f, help in hgweb
was rendered in non-verbose form (
issue3899)