This is a combination of main Ruby commit
https://github.com/ruby/ruby/commit/aefc98891c42024039f19ef45bdfe93fbc590b7c
and my PR correcting the regex https://github.com/ruby/ruby/pull/10819.
Upstream Ruby requests that changes to this test go to readline-ext repo
before being backported to 3.2 branch.

https://github.com/ruby/readline-ext/commit/868f873a78