diff mercurial/txnutil.py @ 43076:2372284d9457

formatting: blacken the codebase

This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.

Done with:

  hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S

# skip-blame mass-reformatting only

# no-check-commit reformats foo_bar functions

Differential Revision: https://phab.mercurial-scm.org/D6971

--- a/mercurial/txnutil.py	Sat Oct 05 10:29:34 2019 -0400
+++ b/mercurial/txnutil.py	Sun Oct 06 09:45:02 2019 -0400
@@ -9,9 +9,8 @@
 
 import errno
 
-from . import (
-    encoding,
-)
+from . import encoding
+
 
 def mayhavepending(root):
     '''return whether 'root' may have pending changes, which are
@@ -19,6 +18,7 @@
     '''
     return root == encoding.environ.get('HG_PENDING')
 
+
 def trypending(root, vfs, filename, **kwargs):
     '''Open  file to be read according to HG_PENDING environment variable