CI / shellcheck + selftests (pull_request) Successful in 1m24s
The step's comment claimed nightly was not optional. CI's own first green run falsified that: 1.100.0-nightly accepts -Z checksum-freshness and resolves freshness by mtime regardless, so the suite's probe reports it and skips the scenario either way. The step stays — twenty seconds, and the coverage returns by itself the day upstream restores the behaviour — but the comment now says that rather than the opposite. The open question about what upstream actually did is daniel/gitdan#62.