* {String|Symbol}#match{?} with nil returns falsy

To improve consistency with Regexp#match{?}

* String#match(nil) returns `nil` instead of TypeError
* String#match?(nil) returns `false` instead of TypeError
* Symbol#match(nil) returns `nil` instead of TypeError
* Symbol#match?(nil) returns `false` instead of TypeError

* Prefer exception

* Follow empty ENV

* Drop outdated specs

* Write ruby/spec for above

https://github.com/ruby/ruby/pull/1506/files#r183242981

* Fix merge miss