qw only splits on ASCII whitespace, like primary tokenisation, but
nowadays unlike the split() formulation with which it's documented.
Document this additional difference from split(). Fixes [perl #132272].
split(" ", q/STRING/);
-the differences being that it generates a real list at compile time, and
+the differences being that it only splits on ASCII whitespace,
+generates a real list at compile time, and
in scalar context it returns the last element in the list. So
this expression: