Merge branch 'ab/ref-filter-no-contains' into maint

Doc update to a recent topic. * ab/ref-filter-no-contains: tag: duplicate mention of --contains should mention --no-contains

Junio C Hamano committed Jun 5, 2017 at 09:03 UTC 0d86bbdc11c1c5afc33f072824f753ffeacbf13c

No changes.