Because if just a single question mark is used, it means the release
manager is unknown. Only if multiple question marks are used it
means it isn't known whether this release will happen.
This schedule lists the projected or historical development and
release schedules for the next, current and previous stable versions
-of Perl. Dates with all question marks will only be releases if
+of Perl. Dates with two or more question marks will only be releases if
deemed necessary by the Pumpking.
=head2 Perl 5.20