code: function mergeTitle( elem ) {
  		merge( elem, function( old ) {
  			var text = elem.children[ 0 ];
  
  			utils.replaceElement( old.children[ 0 ], text );
  			old.children[ 0 ] = text;
  		} );
  	}
docs: Merge <title> tags
  @param {Object} elem New title tag