diff -r 6feaee05bac5 -r d155bf11cf22 mercurial/templates/json/map
--- a/mercurial/templates/json/map	Fri Nov 15 15:56:25 2019 -0500
+++ b/mercurial/templates/json/map	Fri Nov 15 15:58:56 2019 -0500
@@ -66,6 +66,7 @@
   "user": {author|utf8|json},
   "parents": [{join(parent%changesetparent, ", ")}],
   "files": [{join(files, ", ")}],
+  "diff": [{join(diff, ", ")}],
   "phase": {phase|json}
   }'
 changesetbranch = '{name|utf8|json}'