diff -r 7f5108e58083 -r 72d155a792b1 mercurial/debugcommands.py
--- a/mercurial/debugcommands.py	Tue Feb 13 10:20:57 2018 -0500
+++ b/mercurial/debugcommands.py	Tue Feb 13 10:38:02 2018 -0500
@@ -1406,7 +1406,7 @@
             return h
 
     def printrecords(version):
-        ui.write(('* version %s records\n') % version)
+        ui.write(('* version %d records\n') % version)
         if version == 1:
             records = v1records
         else: