Refactoring: Force automated black formatting

[penguinolog]

Checklist

• I've ensured that similar functionality has not already been implemented
• I've ensured that similar functionality has not earlier been proposed and declined
• I've branched off the master or python-dual-support branch
• I've merged fresh upstream into my branch recently
• I've ran tox successfully in local environment
• I've included docstrings and/or documentation and/or examples for my code (if this is a new feature)

[coveralls]

Pull Request Test Coverage Report for Build 6311440614

• 327 of 528 (61.93%) changed or added relevant lines in 11 files are covered.
• 30 unchanged lines in 7 files lost coverage.
• Overall coverage decreased (-0.2%) to 74.125%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
urwid/monitored_list.py	10	12	83.33%
urwid/text_layout.py	44	48	91.67%
urwid/util.py	53	59	89.83%
urwid/treetools.py	0	11	0.0%
urwid/canvas.py	43	55	78.18%
urwid/listbox.py	28	41	68.29%
urwid/display_common.py	58	83	69.88%
urwid/vterm.py	72	103	69.9%
urwid/raw_display.py	12	109	11.01%

Files with Coverage Reduction	New Missed Lines	%
urwid/monitored_list.py	1	92.75%
urwid/util.py	1	88.32%
urwid/canvas.py	2	84.49%
urwid/split_repr.py	2	90.0%
urwid/vterm.py	3	71.77%
urwid/display_common.py	4	73.31%
urwid/raw_display.py	17	18.4%

Totals
Change from base Build 6311193608:	-0.2%
Covered Lines:	7519
Relevant Lines:	10253

---

💛 - Coveralls

[penguinolog]

Automatic AST validated change, coverage change related to lines re-format