[pylint] - Allow __new__ methods to have cls as their first argument even if decorated with @staticmethod for bad-staticmethod-argument (PLW0211) (#12958)

crates/ruff_linter/resources/test/fixtures/pylint/bad_staticmethod_argument.py

@@ -42,3 +42,9 @@ class Foo:
     @classmethod
     def graze(cls, x, y, z):
         pass
+
+
+class Foo:
+    @staticmethod
+    def __new__(cls, x, y, z):  # OK, see https://docs.python.org/3/reference/datamodel.html#basic-customization
+        pass

crates/ruff_linter/src/rules/pylint/rules/bad_staticmethod_argument.rs

@@ -91,13 +91,18 @@ pub(crate) fn bad_staticmethod_argument(
         return;
     };
 
-    if matches!(self_or_cls.name.as_str(), "self" | "cls") {
+    match (name.as_str(), self_or_cls.name.as_str()) {
-        let diagnostic = Diagnostic::new(
+        ("__new__", "cls") => {
+            return;
+        }
+        (_, "self" | "cls") => {}
+        _ => return,
+    }
+
+    diagnostics.push(Diagnostic::new(
         BadStaticmethodArgument {
             argument_name: self_or_cls.name.to_string(),
         },
         self_or_cls.range(),
-        );
+    ));
-        diagnostics.push(diagnostic);
-    }
 }