diff -r 57875cf423c9 -r 2372284d9457 tests/testlib/ext-sidedata.py
--- a/tests/testlib/ext-sidedata.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/tests/testlib/ext-sidedata.py	Sun Oct 06 09:45:02 2019 -0400
@@ -16,12 +16,12 @@
     revlog,
 )
 
-from mercurial.revlogutils import (
-    sidedata,
-)
+from mercurial.revlogutils import sidedata
+
 
-def wrapaddrevision(orig, self, text, transaction, link, p1, p2, *args,
-                    **kwargs):
+def wrapaddrevision(
+    orig, self, text, transaction, link, p1, p2, *args, **kwargs
+):
     if kwargs.get('sidedata') is None:
         kwargs['sidedata'] = {}
     sd = kwargs['sidedata']
@@ -33,6 +33,7 @@
     sd[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
     return orig(self, text, transaction, link, p1, p2, *args, **kwargs)
 
+
 def wraprevision(orig, self, nodeorrev, *args, **kwargs):
     text = orig(self, nodeorrev, *args, **kwargs)
     if nodeorrev != node.nullrev and nodeorrev != node.nullid:
@@ -45,6 +46,7 @@
             raise RuntimeError('sha256 mismatch')
     return text
 
+
 def extsetup(ui):
     extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
     extensions.wrapfunction(revlog.revlog, 'revision', wraprevision)