cosmetic fixes

src/black/linegen.py

@@ -808,9 +808,9 @@ def left_hand_split(
             if leaf.type in OPENING_BRACKETS:
                 if (
                     Preview.generic_type_def_wrapping in mode
-                    and leaf.type
-                    == token.LSQB  # '[' indicates a generic type declaration
-                    and not _should_generic_type_def_in_func_be_splitted(leaf, mode)
+                    # '[' indicates a generic type declaration
+                    and leaf.type == token.LSQB
+                    and not _should_split_generic_type_def(leaf, mode)
                 ):
                     continue
 
@@ -834,7 +834,7 @@ def left_hand_split(
             yield result
 
 
-def _should_generic_type_def_in_func_be_splitted(
+def _should_split_generic_type_def(
     opening_square_bracket: Leaf, mode: Mode
 ) -> bool:
     """

tests/data/cases/generics_wrapping.py

@@ -3,14 +3,14 @@ def func[T](a: T, b: T,) -> T:
     return a
 
 
-def with_magic_trailling_comma[
+def with_magic_trailing_comma[
     T,
     B,
 ](a: T, b: T,) -> T:
     return a
 
 
-def without_magic_trailling_comma[
+def without_magic_trailing_comma[
     T,
     B
 ](a: T, b: T,) -> T:
@@ -45,14 +45,14 @@ def func[T](
     return a
 
 
-def with_magic_trailling_comma[
+def with_magic_trailing_comma[
     T,
     B,
 ](a: T, b: T,) -> T:
     return a
 
 
-def without_magic_trailling_comma[T, B](
+def without_magic_trailing_comma[T, B](
     a: T,
     b: T,
 ) -> T: