Merge #11403

diff --cc .hgignore
index e9286447d694abc4513d759743a237f0627ee904,33e6caa649e0dd4da9b887f9b684ac86fa59c744..d3983dcf2ea4c5a4d0b4516b75a06ba60ddaee05
--- 1/.hgignore
--- 2/.hgignore
+++ b/.hgignore
@@@ -49,7 -60,9 +49,10 @@@ libpython*.
  *.rej
  *~
  Lib/lib2to3/*.pickle
 +Lib/test/data/*
+ PC/python_nt*.h
+ PC/pythonnt_rc*.h
+ PC/*.obj
  PCbuild/*.exe
  PCbuild/*.dll
  PCbuild/*.pdb