Not an issue.

You're right the description is not entirely correct, but neither is what you suggest. You do not have to construct and return a new list object. You can alter list a to be the desired output.

fixed

There is a typo in the final example:

namesace(stuff, 'otherStuff.id') # returns undefined

The function being invoked should be spelled "namespace", rather than "namesace".

The word "integer" is incorrectly spelled in the first test case: "wrong ip for interger: 2154959208".

Thanks for the revision. Changed to MUST and clarified anything less than 1 should return an empty string without a newline ending.

The description states that "You can [not MUST or MUST NOT] leave a newline character at the end of the full checkerboard", however, the tests are unambiguous - they specifically require that a trailing newline character is present in the "size > 1" case, and that a trailing newline character is NOT present in the "size < 1" case. This resulted in some confusion for me.

The description states that "It should remove all values from list a". I find this wording to be incorrect - the implemented function is not expected to alter list a, but instead is expected to construct and return a new list object.