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

Enable Style/EmptyLinesAroundClassBody rubocop cop.

lib/rubygems/test_utilities.rb

@@ -29,6 +29,7 @@ require 'rubygems/remote_fetcher'
 # See RubyGems' tests for more examples of FakeFetcher.
 
 class Gem::FakeFetcher
+
   attr_reader :data
   attr_reader :last_request
   attr_accessor :paths
@@ -161,13 +162,16 @@ class Gem::FakeFetcher
 
     download spec, source.uri.to_s
   end
+
 end
 
 # :stopdoc:
 class Gem::RemoteFetcher
+
   def self.fetcher=(fetcher)
     @fetcher = fetcher
   end
+
 end
 # :startdoc:
 
@@ -187,6 +191,7 @@ end
 # After the gems are created they are removed from Gem.dir.
 
 class Gem::TestCase::SpecFetcherSetup
+
   ##
   # Executes a SpecFetcher setup block.  Yields an instance then creates the
   # gems and specifications defined in the instance.
@@ -341,6 +346,7 @@ class Gem::TestCase::SpecFetcherSetup
       io.write spec.to_ruby_for_cache
     end
   end
+
 end
 
 ##
@@ -352,6 +358,7 @@ end
 # This class was added to flush out problems in Rubinius' IO implementation.
 
 class TempIO < Tempfile
+
   ##
   # Creates a new TempIO that will be initialized to contain +string+.
 
@@ -369,4 +376,5 @@ class TempIO < Tempfile
     flush
     Gem.read_binary path
   end
+
 end