pub fn changed_files_for(r: &PushRef, zero: &str) -> Vec<String>Expand description
Every path touched by ONE ref being pushed.
Split out from changed_files so a caller that runs a suite in a
per-ref worktree — where_to_run takes one tip, not the whole ref
list, for exactly this reason — can ask “what did THIS ref change”
instead of the aggregate across every ref in the push.