Manually merged from https://github.com/rubygems/rubygems/pull/2636

Enable Style/EmptyLinesAroundClassBody rubocop cop.

lib/rubygems/commands/contents_command.rb

@@ -3,6 +3,7 @@ require 'rubygems/command'
 require 'rubygems/version_option'
 
 class Gem::Commands::ContentsCommand < Gem::Command
+
   include Gem::VersionOption
 
   def initialize
@@ -185,4 +186,5 @@ prefix or only the files that are requireable.
       [i, File.join(i, "specifications")]
     end.flatten
   end
+
 end