title: Do I still need source :gemcutter in Gemfile?
body: <p>I have a file "Gemfile" in my Rails project root.</p>
  
  <p>It says <code>source :gemcutter</code> in the very first line.</p>
  
  <p>Do I still need the line? If I'm correct, <code>http://rubygems.org/</code> is the official source, and Gem Cutter was merged into <code>rubygems.org</code>.</p>