Gem::YAMLSerializer#convert_to_backward_compatible_key!

# File tmp/rubies/ruby-3.3.0/lib/rubygems/yaml_serializer.rb, line 84
def convert_to_backward_compatible_key!(key)
  key << "/" if /https?:/i.match?(key) && !%r{/\Z}.match?(key)
  key.gsub!(".", "__")
end