STY: Fix whitespace error from new flake8

QuLogic · QuLogic · commit 530457e5fb90 · 2022-08-09T17:31:01.000-04:00
This only occurs on `v3.5.x` because the test has been rewritten on
`main`.
diff --git a/lib/matplotlib/tests/test_figure.py b/lib/matplotlib/tests/test_figure.py
@@ -581,7 +581,7 @@ def test_invalid_layouts():
     with pytest.warns(UserWarning):
         # this should warn,
         fig.subplots_adjust(top=0.8)
-    assert not(fig.get_constrained_layout())
+    assert not fig.get_constrained_layout()
 
     # Using layout + (tight|constrained)_layout warns, but the former takes
     # precedence.
