Merge branch 'rs/describe-unique-abbrev' into maint

Code clean-up. * rs/describe-unique-abbrev: describe: use strbuf_add_unique_abbrev() for adding short hashes

Junio C Hamano committed Mar 22, 2018 at 14:24 UTC 9bcb48912c73c92409e430ad4614d14414a8c5ad

No changes.