When C<use locale> is in effect, C<sort LIST> sorts LIST according to the
current collation locale. See L<perllocale>.
-Perl does B<not> guarantee that sort is stable. (In a I<stable> sort the
-relative order is preserved for elements where the sort comparison used
-returns that they are equal.) 5.7 happens to use a mergesort, which is
-stable, but 5.6 and earlier used quicksort, which is not. However, do not
-assume that future perls will continue to use a stable sort such as mergesort.
+Perl does B<not> guarantee that sort is stable. (A I<stable> sort
+preserves the input order of elements that compare equal.) 5.7 and
+5.8 happen to use a stable mergesort, but 5.6 and earlier used quicksort,
+which is not stable. Do not assume that future perls will continue to
+use a stable sort.
Examples: