py3: use '%d' for integers instead of '%s'

Differential Revision: https://phab.mercurial-scm.org/D5285

hgext/remotefilelog/debugcommands.py

@@ -33,7 +33,7 b' def debugremotefilelog(ui, path, **opts)'
 
     size, firstnode, mapping = parsefileblob(path, decompress)
 
-    ui.status(_("size: %s bytes\n") % (size))
+    ui.status(_("size: %d bytes\n") % (size))
     ui.status(_("path: %s \n") % (path))
     ui.status(_("key: %s \n") % (short(firstnode)))
     ui.status(_("\n"))