Merge branch 'rs/c-auto-resets-attributes' into maint

When "%C(auto)" appears at the very beginning of the pretty format string, it did not need to issue the reset sequence, but it did. This is a small optimization to already graduated topic. * rs/c-auto-resets-attributes: pretty: avoid adding reset for %C(auto) if output is empty pretty: let %C(auto) reset all attributes