Merge branch 'kh/name-rev-custom-format' into seen

"git name-rev" learned to use custom format instead of the object
name in an extended SHA-1 expression form.

* kh/name-rev-custom-format:
  name-rev: learn --format=<pretty>
  name-rev: wrap both blocks in braces

diff --cc builtin/name-rev.c
Simple merge