Fix highlighting in docs
Fix highlighting in docs

Summary: This is currently highlighted wrong because two consecutive code block merges together: www.phabricator.com/docs/javelin/article/Concepts_Event_Delegation.html

Test Plan: Generated docs.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3359

phacility/javelin,phacility/javelin,phacility/javelin,phacility/javelin,phacility/javelin