Dmitrii

NoMethodError: undefined method `assert_warning'

3

https://github.com/ruby/date/blob/c2d9cc29280e0eabb0bc72175c80704f1737a9fb/test/date/test_date_strftime.rb#L195 Probably it's better to rewrite this test without assert_warning since it's not defined.

Fix incorrect argc2 decrement in datetime_s_iso8601 function

4

Replace the decrement (argc2--) with an increment (argc2++) for the correct number of arguments when opt is provided.