Add specs for CodePointRange

spec/spec_helper.rb

@@ -5,9 +5,6 @@ RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure
   config.example_status_persistence_file_path = ".rspec_status"
 
-  # Disable RSpec exposing methods globally on `Module` and `main`
-  config.disable_monkey_patching!
-
   config.expect_with :rspec do |c|
     c.syntax = :expect
   end