Martin von Zweigbergk <martinvonz@google.com> [Wed, 26 Sep 2018 22:17:26 -0700] rev 39898
bundle: consistently put revnums in "base" collection
The "base" collection contains revnums, except that it can also
contain the "null" symbol. That's a little weird. Let's be consistent.
Differential Revision: https://phab.mercurial-scm.org/D4779