Geе app bootstrap string using a regex (#890)

Author: dxvladislavvolkov

packages/devextreme-cli/src/applications/application.angular.js

@@ -128,7 +128,8 @@ const changeMainTs = (appPath) => {
     moduleWorker.insertImport(filePath, 'devextreme/ui/themes', 'themes', true);
 
     const fileContent = fs.readFileSync(filePath).toString();
-    const firstChaptStr = 'platformBrowserDynamic().bootstrapModule(AppModule)';
+    const bootstrapPattern = /platformBrowserDynamic\(\)\.bootstrapModule\(\s*AppModule\s*(?:,\s*\{[^}]*\})?\s*\)/;
+    const firstChaptStr = fileContent.match(bootstrapPattern)[0];
     const lastChaptStr = '.catch(err => console.error(err));';
 
     fs.writeFileSync(