--- a/mercurial/formatter.py	Thu Feb 15 17:14:45 2018 +0530
+++ b/mercurial/formatter.py	Sat Feb 17 18:09:56 2018 +0900
@@ -291,7 +291,7 @@
         self._out = out
         self._out.write("%s = [\n" % self._topic)
     def _showitem(self):
-        self._out.write('    %s,\n' % pycompat.sysbytes(repr(self._item)))
+        self._out.write('    %s,\n' % pycompat.byterepr(self._item))
     def end(self):
         baseformatter.end(self)
         self._out.write("]\n")