Please use new python test framework.

yeaa

Looks OK, although technically a literal can't be returned, only a pointer can.

okay, edited. please have a look at it now

I added a note for C language to not allocate memory, to return a string literal. But the description has since been altered somwhat.

It's not clear how memory should be allocated in C. The result is non-const, which kind of suggests it shouldn't be static, but the sample tests don't free the results.

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cheers!

Fixed.

same for mine!

@pawptart Please don't resolve issues until everything is resolved.
(my second point was not resolved)

no random tests in javascript

Updated reference solution to be in scope of random tests