Hello! I'm from the future. It seems like you're not a newbie anymore :)

Python test reference

https://www.codewars.com/docs/python-test-reference-1

Up voted for "delete" button.

Recursive solutions fail?

No they don't.

Because sometimes we want to convert from one type to another.

Following link has answer to your question, you may have already figured out though... this is for future seekers.

http://bkaestner.github.io/codewars-rules/#checking-user-code

You would need to make a copy of m. I did this with

subm = m.map(row => row.slice())

Exactly, sorry for not answering to your question, it totally slipped my mind.

I really enjoyed the added difficulty, made me learn a few new things about sorting :-)

I agree with Tony. Besides, the other Kata has poor tests (at least in Python), as it accepts solutions which would return True for "helo" vs. "hello".

Is it a... "response" variable?

I surely may be, if you feel like giving the task to me :)

Most GitHub Flavored Markdown appears to be supported.

The markdown to embed images is:

![alt text](http://dev.codewars.com/images/logo-220ae435.png)

As far as I know there is no built-in support for displaying math.