test: output output for current mercurial-default

See 34a46d48d24e in core mercurial for details.

tests/test-graphviz.t

@@ -184,6 +184,7 @@ Prune B
   $ hg up -r 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg debugobsolete $(getid "desc(B)") --record-parents
+  1 new obsolescence markers
   obsoleted 1 changesets
 
 Rewrite C
@@ -652,9 +653,11 @@ Simulate a fold
   $ echo $(getid "1")
   c027b7b7497231cb16d1255fe3f7af41aecdaa83
   $ hg debugobsolete $(getid "1") $(getid "4")
+  1 new obsolescence markers
   obsoleted 1 changesets
   2 new orphan changesets
   $ hg debugobsolete $(getid "2") $(getid "4")
+  1 new obsolescence markers
   obsoleted 1 changesets
   $ hg debugobsolete
   c027b7b7497231cb16d1255fe3f7af41aecdaa83 959de46543b184da8561fc8d0e775b7305fbf2c2 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
@@ -723,6 +726,7 @@ Split
   $ mkcommit D
 
   $ hg debugobsolete $(getid "1") $(getid "3") $(getid "4")
+  1 new obsolescence markers
   obsoleted 1 changesets
   1 new orphan changesets