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

Enable Style/EmptyLinesAroundClassBody rubocop cop.

lib/rubygems/package/tar_reader/entry.rb

@@ -8,6 +8,7 @@
 # Class for reading entries out of a tar file
 
 class Gem::Package::TarReader::Entry
+
   ##
   # Header for this tar entry
 
@@ -164,4 +165,5 @@ class Gem::Package::TarReader::Entry
     @io.pos = @orig_pos
     @read = 0
   end
+
 end