Merge branch 'cc/ref-is-hidden-microcleanup'

Code cleanup. * cc/ref-is-hidden-microcleanup: refs: use skip_prefix() in ref_is_hidden()

Junio C Hamano committed Aug 11, 2017 at 13:27 UTC afb456a3835b8b22ec6420807243df480a61d815

No changes.