title: How to make --no-ri --no-rdoc the default for gem install?
body: <p>I don't use the RI or RDoc output from the gems I install in my machine or in the servers I handle (I use other means of documentation).</p>
  
  <p>Every gem I install installs RI and RDoc documentation by default, because I forget to set <code>--no-ri --no-rdoc</code>.</p>
  
  <p>Is there a way to make those two flags the default?</p>