title: URLs breaking in Rails 4 if you add a trailing slash?
body: <p>I just updated my blog to Rails 4 from 3. I have a catch all route pattern:</p>
  
  <pre><code>get ':year/:month/:permalink' =&gt; 'posts#show'
  </code></pre>
  
  <p>So routes look like this:</p>
  
  <pre><code>/2012/02/blog_permalink
  </code></pre>
  
  <p>That works fine, but if I add a forward slash, I get:</p>
  
  <pre><code>No route matches [GET] "/2012/02/blog_permalink/"
  </code></pre>
  
  <p>I can't seem to figure this one out? I've tried adding a "/" to the end of the route and using :trailing_slash => true. But both of those didn't help.</p>