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

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/tox/config/cli/parser.py

@@ -66,7 +66,7 @@ def get_type(action: Action) -> type[Any]:
         of_type: type[Any] | None = getattr(action, "of_type", None)
         if of_type is None:
             if isinstance(action, argparse._AppendAction):  # noqa: SLF001
-                if action.nargs in ("+", "*") or (isinstance(action.nargs, int) and action.nargs > 1):
+                if action.nargs in {"+", "*"} or (isinstance(action.nargs, int) and action.nargs > 1):
                     of_type = list[list[action.type]]  # ty: ignore[invalid-type-form] # nargs produces list per invocation
                 else:
                     of_type = list[action.type]  # ty: ignore[invalid-type-form] # runtime generic from argparse action type

tests/session/test_env_select.py

@@ -157,8 +157,19 @@ def test_factor_select(
     [
         ("cov", ("py310-django20-cov", "py310-django21-cov", "py39-django20-cov", "py39-django21-cov")),
         ("py39,django20", ("py39-django20-cov", "py39-django20")),
-        ("py39;py310", ("py310-django20-cov", "py310-django20", "py310-django21-cov", "py310-django21",
-                        "py39-django20-cov", "py39-django20", "py39-django21-cov", "py39-django21")),
+        (
+            "py39;py310",
+            (
+                "py310-django20-cov",
+                "py310-django20",
+                "py310-django21-cov",
+                "py310-django21",
+                "py39-django20-cov",
+                "py39-django20",
+                "py39-django21-cov",
+                "py39-django21",
+            ),
+        ),
     ],
 )
 def test_factor_select_via_env_var(