[doc] Document hb_feature_from_string() syntax
authorKhaled Hosny <khaledhosny@eglug.org>
Tue, 19 Feb 2019 00:23:58 +0000 (02:23 +0200)
committerBehdad Esfahbod <behdad@behdad.org>
Tue, 19 Feb 2019 01:00:44 +0000 (17:00 -0800)
commit6bd4c082e49143d0631881645b81f999347257f8
tree24da43fe4471e91689a5944e5c66a84e4a305fd5
parent3da79dd5b92b89fbf062cbe591e6b1ba83083aec
[doc] Document hb_feature_from_string() syntax

Copied and edited from the util option documentation. The docbook table
syntax is too verbose, but that is the best I can come up with.
src/hb-common.cc