diff -r 15d3facfa40a -r aaad36b88298 mercurial/patch.py
--- a/mercurial/patch.py	Sun Jan 13 20:13:22 2019 -0500
+++ b/mercurial/patch.py	Wed Feb 20 19:28:51 2019 -0500
@@ -925,8 +925,8 @@
         # if they have some content as we want to be able to change it
         nocontent = len(self.header) == 2
         emptynewfile = self.isnewfile() and nocontent
-        return emptynewfile or \
-                any(self.special_re.match(h) for h in self.header)
+        return (emptynewfile
+                or any(self.special_re.match(h) for h in self.header))
 
 class recordhunk(object):
     """patch hunk
@@ -2283,8 +2283,8 @@
             # If the file has been removed, fctx2 is None; but this should
             # not occur here since we catch removed files early in
             # logcmdutil.getlinerangerevs() for 'hg log -L'.
-            assert fctx2 is not None, \
-                'fctx2 unexpectly None in diff hunks filtering'
+            assert fctx2 is not None, (
+                'fctx2 unexpectly None in diff hunks filtering')
             hunks = hunksfilterfn(fctx2, hunks)
         text = ''.join(sum((list(hlines) for hrange, hlines in hunks), []))
         if hdr and (text or len(hdr) > 1):