Enable ts-check

extensions/typescript-basics/build/update-grammars.js

@@ -2,6 +2,7 @@
  *  Copyright (c) Microsoft Corporation. All rights reserved.
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
+// @ts-check
 'use strict';
 
 var updateGrammar = require('../../../build/npm/update-grammar');
@@ -18,10 +19,10 @@ function removeDom(grammar) {
 
 function adaptToJavaScript(grammar, replacementScope) {
 	grammar.name = 'JavaScript (with React support)';
-	grammar.fileTypes = ['.js', '.jsx', '.es6', '.mjs' ];
+	grammar.fileTypes = ['.js', '.jsx', '.es6', '.mjs'];
 	grammar.scopeName = `source${replacementScope}`;
 
-	var fixScopeNames = function(rule) {
+	var fixScopeNames = function (rule) {
 		if (typeof rule.name === 'string') {
 			rule.name = rule.name.replace(/\.tsx/g, replacementScope);
 		}
@@ -47,8 +48,3 @@ updateGrammar.update(tsGrammarRepo, 'TypeScript.tmLanguage', './syntaxes/TypeScr
 updateGrammar.update(tsGrammarRepo, 'TypeScriptReact.tmLanguage', './syntaxes/TypeScriptReact.tmLanguage.json', grammar => removeDom(grammar));
 updateGrammar.update(tsGrammarRepo, 'TypeScriptReact.tmLanguage', '../javascript/syntaxes/JavaScript.tmLanguage.json', grammar => adaptToJavaScript(removeDom(grammar), '.js'));
 updateGrammar.update(tsGrammarRepo, 'TypeScriptReact.tmLanguage', '../javascript/syntaxes/JavaScriptReact.tmLanguage.json', grammar => adaptToJavaScript(removeDom(grammar), '.js.jsx'));
-
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