Update simple-component.md

Trim the textContent in test at line 323 and also update the final example (line 377) to match

Author: MattSwanson

guides/v3.3.0/tutorial/simple-component.md

@@ -320,7 +320,7 @@ In the first test, we just want to verify the output of the component, so we jus
 ```javascript {data-filename="tests/integration/components/rental-listing-test.js" data-diff="+3,+4"}
 test('should display rental details', function(assert) {
   await render(hbs`{{rental-listing rental=rental}}`);
-  assert.equal(this.element.querySelector('.listing h3').textContent, 'test-title', 'Title: test-title');
+  assert.equal(this.element.querySelector('.listing h3').textContent.trim(), 'test-title', 'Title: test-title');
   assert.equal(this.element.querySelector('.listing .owner').textContent.trim(), 'Owner: test-owner', 'Owner: test-owner');
 });
 ```
@@ -374,7 +374,7 @@ module('Integration | Component | rental listing', function (hooks) {
 
   test('should display rental details', async function(assert) {
     await render(hbs`{{rental-listing rental=rental}}`);
-    assert.equal(this.element.querySelector('.listing h3').textContent, 'test-title', 'Title: test-title');
+    assert.equal(this.element.querySelector('.listing h3').textContent.trim(), 'test-title', 'Title: test-title');
     assert.equal(this.element.querySelector('.listing .owner').textContent.trim(), 'Owner: test-owner', 'Owner: test-owner');
   });