title: Rails javascript asset missing after precompile
body: <p>the <a href="http://guides.rubyonrails.org/asset_pipeline.html#highlighter_293656">Rails Guides</a> says:</p>
  
  <blockquote>
    <p>If there are missing precompiled files in production you will get an
    Sprockets::Helpers::RailsHelper::AssetPaths::AssetNotPrecompiledError
    exception indicating the name of the missing file(s).</p>
  </blockquote>
  
  <p>I do execute:</p>
  
  <pre><code>bundle exec rake assets:precompile
  </code></pre>
  
  <p>however I don't get any error, and my javascript file is missing in the <em>manifest.yml</em>. Also it's not appearing in <em>public/assets</em>, so the problem is only on production.</p>
  
  <p>I have in the <em>application.js</em></p>
  
  <pre><code>//= require formalize/jquery-formalize
  </code></pre>
  
  <p>What am I missing? </p>
  
  <p>Thanks.</p>