I have a file "Gemfile" in my Rails project root.
It says source :gemcutter
in the very first line.
Do I still need the line? If I'm correct, http://rubygems.org/
is the official source, and Gem Cutter was merged into rubygems.org
.
You're correct. You don't need it any longer, and yes, it was merged.
Make sure you have an alternate source specified:
source 'https://rubygems.org'