hgext/fix.py

--- a/hgext/fix.py	Tue Sep 25 22:11:17 2018 -0400
+++ b/hgext/fix.py	Tue Sep 25 23:25:36 2018 -0400
@@ -452,7 +452,7 @@
                 continue
             ui.debug('subprocess: %s\n' % (command,))
             proc = subprocess.Popen(
-                pycompat.rapply(procutil.tonativestr, command),
+                procutil.tonativestr(command),
                 shell=True,
                 cwd=procutil.tonativestr(b'/'),
                 stdin=subprocess.PIPE,