message: action => mxAction
diff: @@ -468,7 +468,7 @@ IrcHandler.prototype.onMessage = Promise.coroutine(function*(req, server, fromUs
  );
  let mxAction = MatrixAction.fromIrcAction(action);
  - action.formatMentions(
  + mxAction.formatMentions(
  this.ircBridge.getClientPool().getNickUserIdMappingForChannel(server, channel)
  );
  