code: function( fn ) {
  					var args,
  						l = fn.length;
  
  					if ( !l ) {
  						return "";
  					}
  
  					args = new Array( l );
  					while ( l-- ) {
  
  						// 97 is 'a'
  						args[ l ] = String.fromCharCode( 97 + l );
  					}
  					return " " + args.join( ", " ) + " ";
  				}
docs: function calls it internally, it's the arguments part of the function