lib/carto/parser.js
function() {
                    var args = [], arg;

                    arg = $(this.expression);
                    while (arg) {
                        args.push(arg);
                        if (! $(',')) { break; }
                        arg = $(this.expression);
                    }

                    return args;
                }
function() {
                    var args = [], arg;

                    arg = $(this.expression);
                    while (arg) {
                        args.push(arg);
                        if (! $(',')) { break; }
                        arg = $(this.expression);
                    }

                    return args;
                }
function ( ) { var args = [ ] , arg ; arg = $ ( this . expression ) ; while ( arg ) { args . push ( arg ) ; if ( ! $ ( ',' ) ) { break ; } arg = $ ( this . expression ) ; } return args ; }
Arguments are comma-separated expressions
Arguments are comma - separated expressions