revlog: delete references to deleted nullid sentinel value
We stopped keeping the nullid in the index in
781b2720d2ac (index:
don't include nullid in len(), 2018-07-20). I forgot to update some
comments about it.
Differential Revision: https://phab.mercurial-scm.org/D7366
--- a/mercurial/cext/revlog.c Sun Nov 10 18:15:54 2019 +0100
+++ b/mercurial/cext/revlog.c Fri Nov 08 14:35:53 2019 -0800
@@ -62,10 +62,9 @@
* This class has two behaviors.
*
* When used in a list-like way (with integer keys), we decode an
- * entry in a RevlogNG index file on demand. Our last entry is a
- * sentinel, always a nullid. We have limited support for
+ * entry in a RevlogNG index file on demand. We have limited support for
* integer-keyed insert and delete, only at elements right before the
- * sentinel.
+ * end.
*
* With string keys, we lazily perform a reverse mapping from node to
* rev, using a base-16 trie.
@@ -2466,7 +2465,7 @@
/*
* Delete a numeric range of revs, which must be at the end of the
- * range, but exclude the sentinel nullid entry.
+ * range.
*/
static int index_slice_del(indexObject *self, PyObject *item)
{