[PATCH 1 of 2] cat: record the current behavior of wildcard matches in subrepos

[Yuya Nishihara]

On Thu, 7 Dec 2017 11:54:00 -0600, Kevin Bullock wrote:
> > I think "make hg <x> recurse subrepos by default" is a noticeable BC since
> > we'll have to specify --no-subrepo to get files in the root repository, for
> > example.
> 
> We wouldn't need to grow a flag for that, a fileset could do it: `hg status -X 'set:insubrepo()'`

Yes, that's nicer than a flag. But my points is you'll be surprised if
"hg files" suddenly starts showing all files including subrepos if you are
accustomed to the current subrepo behavior.