How to re-enable a removed file ?

[Matt Harbison]

On Mon, 21 Jan 2019 06:02:45 -0500, Nicolas Pinault via Mercurial  
<mercurial at mercurial-scm.org> wrote:

> Hi,
>
> I use a tool that, when updating some files, remove the files then  
> create new ones with new/same content.
> My problem is that these files are marked as removed.
> How can I "un-remove" them so I can see the difference with previous  
> version ?

It sounds like you can simply `hg add $filename` them back, if there's  
still a file in the filesystem (with potentially different content).   
Depending on what else is removed, you can probably use 'set:removed()'  
instead of naming each file to add.