René Scharfe [off-list ref] writes:

+	# TODO: We should emit the same (or at least a more similar)
+	# error on MINGW (essentially Git for Windows) and all other
+	# platforms.. See the OS-specific code in start_command()
+	grep -E "^(error|fatal): cannot (exec|run|spawn) .*bad-hooks/test-hook" err

Looking great.  Thanks.