Minor: help / direct usage of config (#6011)

Minor: help / direct usage of config

src/_pytest/setuponly.py

@@ -20,8 +20,7 @@ def pytest_addoption(parser):
 @pytest.hookimpl(hookwrapper=True)
 def pytest_fixture_setup(fixturedef, request):
     yield
-    config = request.config
-    if config.option.setupshow:
+    if request.config.option.setupshow:
         if hasattr(request, "param"):
             # Save the fixture parameter so ._show_fixture_action() can
             # display it now and during the teardown (in .finish()).

src/_pytest/warnings.py

@@ -42,7 +42,7 @@ def pytest_addoption(parser):
         type="linelist",
         help="Each line specifies a pattern for "
         "warnings.filterwarnings. "
-        "Processed after -W and --pythonwarnings.",
+        "Processed after -W/--pythonwarnings.",
     )