obsmarker: track operation by default We added support for including the operation responsible for creating the obsmarker in 3546a771e376 (obsolete: add operation metadata to rebase/amend/histedit obsmarkers, 2017-05-09). However, soon thereafter, in f432897a9f49 (obsmarker: add an experimental flag controlling "operation" recording, 2017-05-20), it was hidden behind a config that was off by default. It seems unlikely that people will manually turn it on, and obsmarkers/evolution as a whole is still experimental anyway, so let's turn on the tracking by default. Differential Revision: https://phab.mercurial-scm.org/D722

--- a/mercurial/configitems.py	Wed Sep 20 02:40:25 2017 +0530
+++ b/mercurial/configitems.py	Fri Sep 15 10:42:49 2017 -0700
@@ -191,7 +191,7 @@
     alias=[('experimental', 'evolution.bundle-obsmarker')],
 )
 coreconfigitem('experimental', 'stabilization.track-operation',
-    default=False,
+    default=True,
     alias=[('experimental', 'evolution.track-operation')]
 )
 coreconfigitem('experimental', 'exportableenviron',