fix(@schematics/angular): fix syntax error in main.ts after generating universal

Add missing curly brace for application boostrap wrapper and test
Fixes #13392

Author: mbenzenhoefer

packages/schematics/angular/universal/index.ts

@@ -134,7 +134,7 @@ function wrapBootstrapCall(options: UniversalOptions): Rule {
     const triviaWidth = bootstrapCall.getLeadingTriviaWidth();
     const beforeText = `document.addEventListener('DOMContentLoaded', () => {\n`
       + ' '.repeat(triviaWidth > 2 ? triviaWidth + 1 : triviaWidth);
-    const afterText = `\n${triviaWidth > 2 ? ' '.repeat(triviaWidth - 1) : ''});`;
+    const afterText = `\n${triviaWidth > 2 ? ' '.repeat(triviaWidth - 1) : ''}});`;
 
     // in some cases we need to cater for a trailing semicolon such as;
     // bootstrap().catch(err => console.log(err));

packages/schematics/angular/universal/index_spec.ts

@@ -150,10 +150,11 @@ describe('Universal Schematic', () => {
     const tree = schematicRunner.runSchematic('universal', defaultOptions, appTree);
     const filePath = '/projects/bar/src/main.ts';
     const contents = tree.readContent(filePath);
-    expect(contents).toMatch(/document.addEventListener\('DOMContentLoaded', \(\) => {/);
+    expect(contents)
+      .toMatch(/document.addEventListener\('DOMContentLoaded', \(\) => {[\w\W]+;[\r\n]}\);/);
   });
 
-  it('should wrap the bootstrap decleration in a DOMContentLoaded event handler', () => {
+  it('should wrap the bootstrap declaration in a DOMContentLoaded event handler', () => {
     const filePath = '/projects/bar/src/main.ts';
     appTree.overwrite(
       filePath,