--- a/contrib/hgperf	Tue Nov 12 10:17:59 2019 -0500
+++ b/contrib/hgperf	Thu Nov 14 20:35:11 2019 -0800
@@ -37,18 +37,24 @@
 
 if libdir != '@' 'LIBDIR' '@':
     if not os.path.isabs(libdir):
-        libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
-                              libdir)
+        libdir = os.path.join(
+            os.path.dirname(os.path.realpath(__file__)), libdir
+        )
         libdir = os.path.abspath(libdir)
     sys.path.insert(0, libdir)
 
 # enable importing on demand to reduce startup time
 try:
-    from mercurial import demandimport; demandimport.enable()
+    from mercurial import demandimport
+
+    demandimport.enable()
 except ImportError:
     import sys
-    sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
-                     ' '.join(sys.path))
+
+    sys.stderr.write(
+        "abort: couldn't find mercurial libraries in [%s]\n"
+        % ' '.join(sys.path)
+    )
     sys.stderr.write("(check your install and PYTHONPATH)\n")
     sys.exit(-1)
 
@@ -57,6 +63,7 @@
     util,
 )
 
+
 def timer(func, title=None):
     results = []
     begin = util.timer()
@@ -69,7 +76,7 @@
         ostop = os.times()
         count += 1
         a, b = ostart, ostop
-        results.append((cstop - cstart, b[0] - a[0], b[1]-a[1]))
+        results.append((cstop - cstart, b[0] - a[0], b[1] - a[1]))
         if cstop - begin > 3 and count >= 100:
             break
         if cstop - begin > 10 and count >= 3:
@@ -79,19 +86,27 @@
     if r:
         sys.stderr.write("! result: %s\n" % r)
     m = min(results)
-    sys.stderr.write("! wall %f comb %f user %f sys %f (best of %d)\n"
-                     % (m[0], m[1] + m[2], m[1], m[2], count))
+    sys.stderr.write(
+        "! wall %f comb %f user %f sys %f (best of %d)\n"
+        % (m[0], m[1] + m[2], m[1], m[2], count)
+    )
+
 
 orgruncommand = dispatch.runcommand
 
+
 def runcommand(lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions):
     ui.pushbuffer()
     lui.pushbuffer()
-    timer(lambda : orgruncommand(lui, repo, cmd, fullargs, ui,
-                                 options, d, cmdpats, cmdoptions))
+    timer(
+        lambda: orgruncommand(
+            lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions
+        )
+    )
     ui.popbuffer()
     lui.popbuffer()
 
+
 dispatch.runcommand = runcommand
 
 dispatch.run()