fix space derp from cowboy commit rPc046aa64c16c7c2f956addba06dc7127a9f917be
Summary: yeehaw
Test Plan: also, yeehaw
Reviewers: vrana, epriestley
Reviewed By: epriestley
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D4815