Merge branch 'ah/read-tree-usage-string'

Usage string fix. * ah/read-tree-usage-string: read-tree: replace bracket set with parentheses to clarify usage

Junio C Hamano committed Sep 1, 2015 at 16:31 UTC 0b20a4680bf668ba2719fa48a9bdbf137253a4b6

No changes.