title: Edit rails gem without restarting server
body: <p>Rails3:
  I cloned an existing gem in order to modify it in development.
  I put in my gemfile:</p>
  
  <p>gem 'my_gem_name', :path => '../gems/my_gem_name'</p>
  
  <p>It's working fine, but every time I want to edit the gem, I have to restart my rails server.
  Is there a way that I don't need to restart the server?</p>
  
  <p>For view/controller/helper files there is the setting <code>config.cache_classes = false</code> but I wasn't able to find a similar one for the locals gem.</p>