Got rid of a bunch of duplicate tests from the upstream merge. Added tests for take_until_s: take_until_s_succeed, take_until_s_incomplete, and take_until_s_error.
Got rid of a bunch of duplicate tests from the upstream merge. Added tests for take_until_s: take_until_s_succeed, take_until_s_incomplete, and take_until_s_error.

Geal/nom,Keruspe/nom,pwoolcoc/nom,sourrust/nom,meh/nom,AndyShiue/nom