Subject: bug#18837: 25.0.50; `sort` -- modify function to preserve original list.

From: Stefan Monnier <[email-masked]>
Date: Sat, 25 Oct 2014 22:44:45 -0400

> The doc-string for the function `sort` states that `SEQ is modified by
> side effects`; however, it does not state in what way the original
> list gets modified or why such a feature might somehow be useful.

The "usefulness" is to avoid allocating another list in the case where
the unsorted list won't be used later on anyway.

        Stefan