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

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 2, 2017 at 15:06 UTC ce079b9567678dc01b4c5fac4853b134bdb4e1dc

No changes.