diff -r 6439cefaeb64 -r e7a2cc84dbc0 mercurial/help/internals/revlogs.txt
--- a/mercurial/help/internals/revlogs.txt	Wed Jan 09 15:45:17 2019 -0800
+++ b/mercurial/help/internals/revlogs.txt	Wed Jan 09 17:41:36 2019 -0800
@@ -66,8 +66,6 @@
 
 0
    Store revision data inline.
-1
-   Generaldelta encoding.
 
 The following header values are common:
 
@@ -159,8 +157,10 @@
 
 (In development. Format not finalized or stable.)
 
-Version 2 is currently identical to version 1. This will obviously
-change.
+Version 2 is identical to version 2 with the following differences.
+
+There is no dedicated *generaldelta* revlog format flag. Instead,
+the feature is implied enabled by default.
 
 Delta Chains
 ============