strip: use %d for known-int string interpolation

Differential Revision: https://phab.mercurial-scm.org/D1884

hgext/strip.py

@@ -215,7 +215,7 b' def stripcmd(ui, repo, *revs, **opts):'
 
             # only reset the dirstate for files that would actually change
             # between the working context and uctx
-            descendantrevs = repo.revs("%s::.", uctx.rev())
+            descendantrevs = repo.revs(b"%d::.", uctx.rev())
             changedfiles = []
             for rev in descendantrevs:
                 # blindly reset the files, regardless of what actually changed