Enforce no empty lines around class body in rubygems

To normalize the code style with `bundler`.

lib/rubygems/commands/push_command.rb

@@ -5,7 +5,6 @@ require 'rubygems/gemcutter_utilities'
 require 'rubygems/package'
 
 class Gem::Commands::PushCommand < Gem::Command
-
   include Gem::LocalRemoteOptions
   include Gem::GemcutterUtilities
 
@@ -104,5 +103,4 @@ The push command will use ~/.gem/credentials to authenticate to a server, but yo
       gem_metadata["allowed_push_host"]
     ]
   end
-
 end