title: Use of apostrophe vs single quote/backtick
body: <p>I'm new to Angular, and while following along to a tutorial I made a slight change out of habit when writing the module states:</p>
  
  <pre><code>.state('sports.medals', {
      url: '/:sportName',
      templateUrl: 'sports/sports-medals.html',
      resolve: {
        sportService: function($http, $stateParams){
          return $http.get('/sports/${ $stateParams.sportName }');
        }
      },
  </code></pre>
  
  <p>This compiles perfectly fine within the rest of the project, no errors. However, when the call is made to this function, it reads the <code>get</code> contents as one whole string instead of parsing the contents as it should.</p>
  
  <p>The correct way to call this is apparently:</p>
  
  <pre><code> .state('sports.medals', {
          url: '/:sportName',
          templateUrl: 'sports/sports-medals.html',
          resolve: {
            sportService: function($http, $stateParams){
              return $http.get(`/sports/${ $stateParams.sportName }`);
            }
          },
  </code></pre>
  
  <p>using the     <code>`</code> apostrophe/backtick instead of the single quote <code>'</code></p>
  
  <p>As a programmer I've almost always exclusively used the single quote when working with javascript and/or double-quotes within parameters, so this surprised me and wasn't immediately apparent. Is there a reason for this behavior that is documented somewhere? Should I get in the habit of using backticks over single quotes? I would like to avoid other such surprises. </p>