code: function( attName, attValue ) {
  
  			if ( typeof attValue == 'string' ) {
  				this.forceSimpleAmpersand && ( attValue = attValue.replace( /&amp;/g, '&' ) );
  				// Browsers don't always escape special character in attribute values. (#4683, #4719).
  				attValue = CKEDITOR.tools.htmlEncodeAttr( attValue );
  			}
  
  			this._.output.push( ' ', attName, '="', attValue, '"' );
  		}
docs: Writes an attribute. This function should be called after opening the
  tag with {@link #openTagClose}.
  
  // Writes ' class="MyClass"'.
  writer.attribute( 'class', 'MyClass' );
  
  @param {String} attName The attribute name.
  @param {String} attValue The attribute value.