--- a/tests/dumbhttp.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/dumbhttp.py	Sun Oct 06 09:45:02 2019 -0400
@@ -23,36 +23,64 @@
 OptionParser = optparse.OptionParser
 
 if os.environ.get('HGIPV6', '0') == '1':
+
     class simplehttpserver(httpserver.httpserver):
         address_family = socket.AF_INET6
+
+
 else:
     simplehttpserver = httpserver.httpserver
 
+
 class _httprequesthandler(httpserver.simplehttprequesthandler):
     def log_message(self, format, *args):
         httpserver.simplehttprequesthandler.log_message(self, format, *args)
         sys.stderr.flush()
 
+
 class simplehttpservice(object):
     def __init__(self, host, port):
         self.address = (host, port)
+
     def init(self):
         self.httpd = simplehttpserver(self.address, _httprequesthandler)
+
     def run(self):
         self.httpd.serve_forever()
 
+
 if __name__ == '__main__':
     parser = OptionParser()
-    parser.add_option('-p', '--port', dest='port', type='int', default=8000,
-        help='TCP port to listen on', metavar='PORT')
-    parser.add_option('-H', '--host', dest='host', default='localhost',
-        help='hostname or IP to listen on', metavar='HOST')
+    parser.add_option(
+        '-p',
+        '--port',
+        dest='port',
+        type='int',
+        default=8000,
+        help='TCP port to listen on',
+        metavar='PORT',
+    )
+    parser.add_option(
+        '-H',
+        '--host',
+        dest='host',
+        default='localhost',
+        help='hostname or IP to listen on',
+        metavar='HOST',
+    )
     parser.add_option('--logfile', help='file name of access/error log')
-    parser.add_option('--pid', dest='pid',
-        help='file name where the PID of the server is stored')
-    parser.add_option('-f', '--foreground', dest='foreground',
+    parser.add_option(
+        '--pid',
+        dest='pid',
+        help='file name where the PID of the server is stored',
+    )
+    parser.add_option(
+        '-f',
+        '--foreground',
+        dest='foreground',
         action='store_true',
-        help='do not start the HTTP server in the background')
+        help='do not start the HTTP server in the background',
+    )
     parser.add_option('--daemon-postexec', action='append')
 
     (options, args) = parser.parse_args()
@@ -60,18 +88,26 @@
     signal.signal(signal.SIGTERM, lambda x, y: sys.exit(0))
 
     if options.foreground and options.logfile:
-        parser.error("options --logfile and --foreground are mutually "
-                     "exclusive")
+        parser.error(
+            "options --logfile and --foreground are mutually " "exclusive"
+        )
     if options.foreground and options.pid:
         parser.error("options --pid and --foreground are mutually exclusive")
 
-    opts = {b'pid_file': options.pid,
-            b'daemon': not options.foreground,
-            b'daemon_postexec': pycompat.rapply(encoding.strtolocal,
-                                                options.daemon_postexec)}
+    opts = {
+        b'pid_file': options.pid,
+        b'daemon': not options.foreground,
+        b'daemon_postexec': pycompat.rapply(
+            encoding.strtolocal, options.daemon_postexec
+        ),
+    }
     service = simplehttpservice(options.host, options.port)
     runargs = [sys.executable, __file__] + sys.argv[1:]
     runargs = [pycompat.fsencode(a) for a in runargs]
-    server.runservice(opts, initfn=service.init, runfn=service.run,
-                      logfile=options.logfile,
-                      runargs=runargs)
+    server.runservice(
+        opts,
+        initfn=service.init,
+        runfn=service.run,
+        logfile=options.logfile,
+        runargs=runargs,
+    )