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

A new builtin "git format-rev" is introduced for pretty formatting one revision expression per line or commit object names found in running text. * kh/name-rev-custom-format: format-rev: introduce builtin for on-demand pretty formatting name-rev: make dedicated --annotate-stdin --name-only test name-rev: factor code for sharing with a new command name-rev: run clang-format before factoring code name-rev: wrap both blocks in braces