help: fix description of revlog version 2
Differential Revision: https://phab.mercurial-scm.org/D8576
--- a/mercurial/helptext/internals/revlogs.txt Tue May 26 08:15:09 2020 -0400
+++ b/mercurial/helptext/internals/revlogs.txt Fri May 22 22:20:37 2020 +0800
@@ -161,7 +161,7 @@
(In development. Format not finalized or stable.)
-Version 2 is identical to version 2 with the following differences.
+Version 2 is identical to version 1 with the following differences.
There is no dedicated *generaldelta* revlog format flag. Instead,
the feature is implied enabled by default.