rubyspec/mspec — comment on commit 5aff4a48cc278b4992f14681571d8be9ff9edd90
File: lib/mspec/helpers/ruby_exe.rb line 134
By jc00ke:

I was setting `saved_env[key]` to `ENV[key]` regardless of its existence in `ENV` as then it would be nil'd out in the ensure clause. With this change won't we get `ENV` k/v pairs hanging around?