title: Rails: translation missing error
body: <p>I am trying to learn ruby on rails. And when doing internationalisation, I'm getting the error:</p>
  
  <blockquote>
    <p>translation missing: en.store.index.title_html</p>
  </blockquote>
  
  <p>Below is my <code>en.yml</code> file</p>
  
  <pre><code>en:
    layouts:
      application: 
        title: "Pragmatic book shelf"
        home: "Home"
        questions: "Questions"
        news: "News"
        contact: "Contact"
  
    store:
      index:
      title_html: "Your Pragmatic Catalog" 
      add_html: "Add to Cart"
  </code></pre>
  
  <p>I have searched the solution, and it says allow only spaces in en.yml file. It's already written with only spaces. Any help will be highly appreciated.</p>