phases: return zero for no-op operations (issue4751) (BC)
It is rather unhelpful to return 1 if there were no changes because
the request matches the current state of phases. So we just undo that.
fixbundle() {
grep -v 'saving bundle' | grep -v 'saved backup' | \
grep -v added | grep -v adding | \
grep -v "unable to find 'e' for patching" | \
grep -v "e: No such file or directory"
}