old_contents: var message_live_update = (function () {
  
  var exports = {};
  
  exports.update_stream_name = function (stream_id, new_name) {
      _.each([home_msg_list, current_msg_list, message_list.all], function (list) {
          list.update_stream_name(stream_id, new_name);
      });
  };
  
  exports.update_user_full_name = function (user_id, full_name) {
      _.each([home_msg_list, current_msg_list, message_list.all], function (list) {
          list.update_user_full_name(user_id, full_name);
      });
  };
  
  exports.update_avatar = function (user_id, avatar_url) {
      var url = avatar_url;
      url = people.format_small_avatar_url(url);
  
      _.each([home_msg_list, current_msg_list, message_list.all], function (list) {
          list.update_user_avatar(user_id, url);
      });
  };
  
  return exports;
  
  }());
  if (typeof module !== 'undefined') {
      module.exports = message_live_update;
  }
  
  
new_contents: var message_live_update = (function () {
  
  var exports = {};
  
  exports.update_stream_name = function (stream_id, new_name) {
      _.each([home_msg_list, message_list.narrowed, message_list.all], function (list) {
          if (list === undefined) {
              return;
          }
          list.update_stream_name(stream_id, new_name);
      });
  };
  
  exports.update_user_full_name = function (user_id, full_name) {
      _.each([home_msg_list, message_list.narrowed, message_list.all], function (list) {
          if (list === undefined) {
              return;
          }
          list.update_user_full_name(user_id, full_name);
      });
  };
  
  exports.update_avatar = function (user_id, avatar_url) {
      var url = avatar_url;
      url = people.format_small_avatar_url(url);
  
      _.each([home_msg_list, message_list.narrowed, message_list.all], function (list) {
          if (list === undefined) {
              return;
          }
          list.update_user_avatar(user_id, url);
      });
  };
  
  return exports;
  
  }());
  if (typeof module !== 'undefined') {
      module.exports = message_live_update;
  }
  
  
subject: Fix double re-rendering of home_msg_list.