filenames starting with a dash

[joyously]

I saw a recent issue over at difftastic (PR 1025), about filenames that start with a dash being interpreted as options by Git.

Git's external diff protocol is entirely positional — it passes 7 arguments (9 for a rename) and never passes options — so there's no way for the caller to add a -- separator on difftastic's behalf.

I was wondering if this is a problem

1. when jj calls Git
2. when jj calls external diff/merge tools