My question is simple: Mercurial leaves .orig files after performing a merge (or histedit, etc.) I want to prevent this from occurring.
This has been discussed before, but without a satisfactory answer. For instance, How do you disable mercurial from leaving .orig files after a merge? discusses close to this exact issue, but the accepted answer deals only with hg revert, and does not (as of today) fix issues with merge.
Similarly, How to automatically remove all .orig files in Mercurial working tree? discusses how to get rid of the files once they're there, but I want a solution that prevents them from appearing in the first place.
I'm aware of origbackuppath, which can be used to shuffle the files off to another directory, but that still requires a cron job to get rid of them, so it's not a solution unless there's a /dev/null-equivalent for directories.
