D7410: extensions: suppress a strange pytype failure

[dlax (Denis Laxalde)]

dlax added inline comments.

INLINE COMMENTS

> dlax wrote in extensions.py:96
> the doc indeed says that "fd" is file object

In https://github.com/python/typeshed/blob/master/stdlib/3/imp.pyi type of `find_module` seems wrong.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D7410/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D7410

To: durin42, #hg-reviewers, dlax
Cc: dlax, mercurial-devel