Merge branch 'wp/sha1-name-negative-match'

A new "<branch>^{/!-<pattern>}" notation can be used to name a commit that is reachable from <branch> that does not match the given <pattern>. * wp/sha1-name-negative-match: object name: introduce '^{/!-<negative pattern>}' notation test for '!' handling in rev-parse's named commits