docs: function mergeMeta( elem ) {
  		var attr = elem.attribs,
  			old = _.where( destChildren, {
  				name: 'meta'
  			} ),
  			merged = false;
  
  		[ 'charset', 'name', 'http-equiv' ].forEach( function( meta ) {
  			if ( !attr[ meta ] ) {
  				return;
  			}
  
  			old.forEach( function( el ) {
  				var idx;
  
  				if ( ( el.attribs[ meta ] === attr[ meta ] ) ||
  					( meta === 'charset' && el.attribs[ meta ] ) ) {
  					idx = destChildren.indexOf( el );
  					utils.replaceElement( el, elem );
  					destChildren[ idx ] = elem;
  					merged = true;
  				}
  			} );
  		} );
  
  		return merged;
  	}