title: Non-blank ng-app name stops expression being evaluated
body: <p>Why does <code>ng-app="myApp"</code> cause the expression to not evaluate?</p>
  
  <p>If I use <code>ng-app=""</code>, it works fine:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  
  &lt;/head&gt;
  &lt;script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"&gt;&lt;/script&gt;
  &lt;body&gt;
  
  &lt;div ng-app="" ng-init="quantity=2;price=5"&gt;
  
  &lt;h2&gt;Cost Calculator&lt;/h2&gt;
  
  Quantity: &lt;input type="number" ng-model="quantity"&gt;
  Price: &lt;input type="number" ng-model="price"&gt;
  
  &lt;p&gt;&lt;b&gt;Total in dollar:&lt;/b&gt; {{quantity * price}}&lt;/p&gt;
  
  &lt;/div&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>