working 'Try CoffeeScript' in the docs

lib/coffee_script/coffee-script.js

@@ -1,5 +1,6 @@
 (function(){
   var compiler, lexer, parser, path;
+  // Set up for both the browser and the server.
   if ((typeof process !== "undefined" && process !== null)) {
     process.mixin(require('./nodes'));
     path = require('path');
@@ -31,6 +32,10 @@
       return this.pos;
     }
   };
+  // Improved error messages.
+  parser.parseError = function parseError(message, hash) {
+    throw new Error('Unexpected ' + hash.token + ' on line ' + hash.line);
+  };
   exports.VERSION = '0.5.0';
   // Compile CoffeeScript to JavaScript, using the Coffee/Jison compiler.
   exports.compile = function compile(code, options) {