ref-filter: small cleanups and fixes

This series contains a few of the small fixes and comments which I've gathered from reviews of my earlier series 1 to add the '--start-after' flag to 'git-for-each-ref(1)'.

Individually each patch doesn't hold too much weight on its own, but together these small improvements add up. That said, if any individual commit is too small for the noise generated, we could simply drop it or combine some together. Happy to do that.

This is based on top of master 90c0775e (The eleventh batch, 2025-07-16) with 'kn/for-each-ref-skip' merged in.

Signed-off-by: Karthik Nayak karthik.188@gmail.com

--- b4-submit-tracking --- { "series": { "revision": 1, "change-id": "20250721-kn-small-cleanups-a01fe5d2756d", "prefixes": [] } }