...and there's also:
--- a/lib/Sort/Key.pm
+++ b/lib/Sort/Key.pm
@@ -313,7 +313,7 @@
L<Sort::Key::IPv4>, L<Sort::Key::DateTime> and L<Sort::Key::OID>
modules add support for additional datatypes to Sort::Key.
-L<Sort::Key::External> allows to sort huge lists that do not fit in
+L<Sort::Key::External> allows one to sort huge lists that do not fit in
the available memory.
Other interesting Perl sorting modules are L<Sort::Maker>,