Summary: Fixes T3280 - when a pontificate brought back multiple transactions, we were rendering a comma. Yay hsprintf. Also fixes the noconpherences view, which broke at some point recently.
Test Plan: sent comment, then replied from different browser. when both comments loaded noted no comma. loaded a conpherence view with no conpherences and verified it looked good.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin, chad
Maniphest Tasks: T3280
Differential Revision: https://secure.phabricator.com/D6079
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