[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

changelog.d/1457.breaking.md

@@ -1,7 +1,7 @@
 Class-level `kw_only=True` behavior is now consistent with `dataclasses`.
 
-Previously, a class that sets `kw_only=True` makes all attributes keyword-only, 
-including those from base classes.  If an attribute sets `kw_only=False`, that 
+Previously, a class that sets `kw_only=True` makes all attributes keyword-only,
+including those from base classes.  If an attribute sets `kw_only=False`, that
 setting is ignored, and it is still made keyword-only.
 
 Now, only the attributes defined in that class that doesn't explicitly set
@@ -22,7 +22,7 @@ class Subclass(Base):
 
 Here, we have a `kw_only=True` attrs class (`Base`) with an attribute that sets
 `kw_only=False` and has a default (`Base.b`), and then create a subclass (`Subclass`)
-with required arguments (`Subclass.c`).  Previously this would work, since it 
+with required arguments (`Subclass.c`).  Previously this would work, since it
 would make `Base.b` keyword-only, but now this fails since `Base.b` is positional, and
-we have a required positional argument (`Subclass.c`) following another argument with 
-defaults.
+we have a required positional argument (`Subclass.c`) following another argument with
+defaults.