--- a/mercurial/templateutil.py	Thu Feb 02 17:23:31 2023 +0100
+++ b/mercurial/templateutil.py	Thu Feb 02 17:37:58 2023 +0100
@@ -868,7 +868,7 @@
                 yield i
             elif i is None:
                 pass
-            elif not util.safehasattr(i, b'__iter__'):
+            elif not util.safehasattr(i, '__iter__'):
                 yield pycompat.bytestr(i)
             else:
                 for j in flatten(context, mapping, i):