title: IO.read("#.../layouts/application.html.erb") return line 'applicatio...s-track' instead 'application'
body: <p>I have following rspec test:</p>
  
  <pre><code>scenario 'layout file loads assets' do
      layout_file = IO.read("#{dummy_app_path}/app/views/layouts/application.html.erb")
  
      expect(layout_file).to match(/stylesheet_link_tag 'application'/)
    end
  </code></pre>
  
  <p>test is red because:</p>
  
  <pre><code>expected "&lt;!DOCTYPE html&gt;\n&lt;html&gt;\n&lt;head&gt;\n  &lt;title&gt;DummyApp&lt;/title&gt;\n  &lt;%= stylesheet_link_tag    'applicatio...s-track' =&gt; true %&gt;\n 
  </code></pre>
  
  <p>Why return <strong>applicatio...s-track</strong>? Why no 'application'?
  Can you please explain me.</p>
  
  <p>Thank you for you help.</p>