title: Install Ruby support for VIM on Mac OS X
body: <p>Mac OS X 10.6 (Snow Leopard) has VIM pre-installed (version 7.2), which is great.</p>
  
  <p>It also has Ruby pre-installed (version 1.8.7) which is great too.</p>
  
  <p>However, I want Ruby autocompletion in VIM. Looking up the VIM version (vim --version) shows -ruby (i.e. ruby support isn't enabled).</p>
  
  <p>How to enable ruby for my VIM installation?</p>