…utput for testing with newer perls
per the recent change.
…art_form. It can cause rendering problems in some cases. Thanks to SJOHNSTON@cpan.org (RT#67719)
and test and document the prior behavior when the return value is missing. The new short-circuit logic is cleaner but equivalent, and avoids emitting an "unitialized string" warning. Thanks to Yanick for suggesting this direction.
…undef if the -name and -value args aren't provided. This new behavior is also consistent with the docs and code of CGI::Simple::Cookie.