nl_tokens: parse single or double quoted string
pl_tokens: function parseString ( endQuote ) { chars . push ( '"' ) ; i ++ ; var c = curr ( ) ; while ( i < jsString . length && c !== endQuote ) { if ( c === '"' && prev ( ) !== '\\' ) { // unescaped double quote, escape it chars . <mask> ( '\\"' ) ; } else if ( controlChars . hasOwnProperty ( c ) ) { // replace unescaped control characters with escaped ones chars . push ( controlChars [ c ] ) } else if ( c === '\\' ) { // remove the escape character when followed by a single quote ', not needed i ++ ; c = curr ( ) ; if ( c !== '\'' ) { chars . push ( '\\' ) ; } chars . push ( c ) ; } else { // regular character chars . push ( c ) ; } i ++ ; c = curr ( ) ; } if ( c === endQuote ) { chars . push ( '"' ) ; i ++ ; } }