title: How to fix RVM gems "[ missing bin/ruby ]"
body: <p>After executing <code>rvm list</code> I get following output:</p>
  <pre><code>rvm rubies
  
     gems [ missing bin/ruby ]
  =* ruby-2.0.0-p645 [ x86_64 ]
     ruby-2.1.6 [ x86_64 ]
     ruby-2.2.1 [ x86_64 ]
  </code></pre>
  <p>What does <code>gems [ missing bin/ruby ]</code> mean?</p>
  <p>Is <code>gems</code> some kind of system gemset? It wasn't created by me and I don't know if I can, or should, remove it.</p>