bug#63470: [PATCH] Use faster option for running vc-hg status

[Eli Zaretskii]

> Date: Fri, 12 May 2023 23:06:06 +0300
> Cc: 63470@debbugs.gnu.org
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> On 12/05/2023 22:43, Eli Zaretskii wrote:
> >> From: Spencer Baugh<sbaugh@janestreet.com>
> >> Date: Fri, 12 May 2023 15:28:43 -0400
> >>
> >> As the comment says, this causes us to depend on Mercurial 4.2, which
> >> was released in 2017.  However, in modern Mercurial, removing the
> >> "re:" "-I" "." options provides a 10x-20x speedup (because it allows
> >> the Rust implementation of "hg status" to be used), so it's certainly
> >> worth losing this compatibility.
> > I don't understand: what will happen to users of Mercurial < 4.2?
> 
> How much longer do we need to support CentOS 7?

As long as it's feasible, i.e. doesn't cause us to jump through too
many hoops.