title: Make pry to skip rails and other gems code
body: <p>I want to use pry-debugger gem for understanding others people code (rails mostly).<br>
  Usually I call binding.pry, then <code>skip</code>-ing repeatedly and watching code it outputs. <br>
  Is there a way to make pry skip rails(and other gems) code and show me only local code in rails app directory?<br>
  I`ve tried something like this:</p>
  
  <pre><code>while(_dir_ =~ /.rvm/) do step end
  while(_dir_ =~ /.rvm/) do _pry_.eval('step') end
  _pry_.eval "while(_dir_ =~ /.rvm/) do _pry_.eval('step') end"
  </code></pre>
  
  <p>But it didn`t work.</p>