[PATCH 1 of 3] match: remove unnecessary '^' from regexes

[Yuya Nishihara]

On Sun, 09 Jul 2017 23:44:41 -0700, Martin von Zweigbergk via Mercurial-devel wrote:
> # HG changeset patch
> # User Martin von Zweigbergk <martinvonz at google.com>
> # Date 1499665982 25200
> #      Sun Jul 09 22:53:02 2017 -0700
> # Node ID 47e360b2290a0a03ff789cdba96af6fcd4292ae0
> # Parent  ccb3e5399921db16e95e7429cc2fb9ef82ee846e
> match: remove unnecessary '^' from regexes

Queued the first two, thanks.