Make Kernel#pp available by default #4914
@olleolleolle It was a typo, sorry about that. I copy&pasted the body of another PR and forgot to remove the bit about the tests.
I scanned MRI source code to verify if they were testing this new feature, but I couldn't find any tests, although my search was not exhaustive. So, that's the reason why I didn't include test. If they are needed, just let me know.