Issue 4088 - JSHydra-generated module scopes shouldn't be called immediately

scripts/abprewrite.js

 // This script rewrites AST to be compatible with JavaScript 1.5 and decompiles
 // the modified tree then
 
 include("../scripts/astDecompile.js");
 include("../utils/beautify.js");
 
 let headerPrinted = false;
 
 // See https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API for
 // AST structure.
@@ skipping 538 matching lines @@
 
   if (options.module)
   {
     // Wrap the entire module into a function to give it an independent scope.
     // Return exported symbols:
     //
     // require.scopes["foobar"] = (function() {
     //   var exports = {};
     //   ...
     //   return exports;
-    // })();
+    // });
     let code = 'require.scopes["' + options.filename + '"] = (function() {\n' +
                decompileAST(ast).replace(/^("use strict";\n)?/,
                                          "$1var exports = {};\n") +
                'return exports;\n' +
-               '})();\n';
+               '});\n';
     _print(js_beautify(code, options));
   }
   else
     _print(js_beautify(decompileAST(ast), options));
 }