diff -r 884b595f5195 -r 5326e4ef1dab mercurial/pure/mpatch.py
--- a/mercurial/pure/mpatch.py	Mon Oct 02 18:18:57 2017 +0100
+++ b/mercurial/pure/mpatch.py	Fri Sep 29 15:49:20 2017 +0000
@@ -75,7 +75,8 @@
     # copy all the patches into our segment so we can memmove from them
     pos = b2 + bl
     m.seek(pos)
-    for p in bins: m.write(p)
+    for p in bins:
+        m.write(p)
 
     for plen in plens:
         # if our list gets too long, execute it