sidedata: move to new sidedata storage in revlogv2 The current (experimental) sidedata system uses flagprocessors to signify the presence and store/retrieve sidedata from the raw revlog data. This proved to be quite fragile from an exchange perspective and a lot more complex than simply having a dedicated space in the new revlog format. This change does not handle exchange (ironically), so the test for amend - that uses a bundle - is broken. This functionality is split into the next patches. Differential Revision: https://phab.mercurial-scm.org/D9993

--- a/tests/simplestorerepo.py	Wed Jan 20 18:35:12 2021 +0100
+++ b/tests/simplestorerepo.py	Mon Jan 18 11:44:51 2021 +0100
@@ -300,7 +300,7 @@
             text = rawtext
         else:
             r = flagutil.processflagsread(self, rawtext, flags)
-            text, validatehash, sidedata = r
+            text, validatehash = r
         if validatehash:
             self.checkhash(text, node, rev=rev)