fix ruff errors

Makefile

@@ -230,10 +230,10 @@ lint-all:  ## Run all linters
 # ===================================================================
 
 fix-black:
-	git ls-files '*.py' | xargs $(PYTHON) -m black
+	@git ls-files '*.py' | xargs $(PYTHON) -m black
 
 fix-ruff:
-	@git ls-files '*.py' | xargs $(PYTHON) -m ruff --no-cache --fix
+	@git ls-files '*.py' | xargs $(PYTHON) -m ruff check --no-cache --fix
 
 fix-unittests:  ## Fix unittest idioms.
 	@git ls-files '*test_*.py' | xargs $(PYTHON) -m teyit --show-stats

psutil/_pswindows.py

@@ -702,12 +702,10 @@ def is_permission_err(exc):
     # On Python 2 OSError doesn't always have 'winerror'. Sometimes
     # it does, in which case the original exception was WindowsError
     # (which is a subclass of OSError).
-    if getattr(exc, "winerror", -1) in (
+    return getattr(exc, "winerror", -1) in (
         cext.ERROR_ACCESS_DENIED,
         cext.ERROR_PRIVILEGE_NOT_HELD,
-    ):
-        return True
-    return False
+    )
 
 
 def convert_oserror(exc, pid=None, name=None):

psutil/tests/test_linux.py

@@ -1360,9 +1360,7 @@ def is_storage_device(name):
 
     def test_emulate_use_sysfs(self):
         def exists(path):
-            if path == '/proc/diskstats':
-                return False
-            return True
+            return path == '/proc/diskstats'
 
         wprocfs = psutil.disk_io_counters(perdisk=True)
         with mock.patch(