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

Enable Style/EmptyLinesAroundClassBody rubocop cop.

lib/rubygems/commands/signout_command.rb

@@ -2,6 +2,7 @@
 require 'rubygems/command'
 
 class Gem::Commands::SignoutCommand < Gem::Command
+
   def initialize
     super 'signout', 'Sign out from all the current sessions.'
   end
@@ -28,4 +29,5 @@ class Gem::Commands::SignoutCommand < Gem::Command
       say 'You have successfully signed out from all sessions.'
     end
   end
+
 end