When I added a newline to regexes checking for 'digits only', 9 out of 14 implementations passed it

I provided 14 different ways of 'checking if a string is digits only' with a string consisting of 123 followed by a newline.
Kotaku

Our Red String

All the Latest Game Footage and Images from Our Red String Lena and Ian are two very different people who find themselves in a very similar moment in their lives. Both struggling to achieve their ...