committablectx: cache _status in _poststatus
A future patch will remove the old workingctx.status which caches the status of
the working directory, therefore we now cache this status in the poststatus
hook of committablectx.
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"
}