fix clippy and make tests meaningful

Author: AlexWaygood

crates/ruff_linter/resources/test/fixtures/flake8_return/RET501.py

@@ -33,12 +33,15 @@ def prop(self) -> None:
 
     @abc.abstractproperty
     def prop2(self) -> None:
+        print("Override me")
         return None
 
     @types.DynamicClassAttribute
     def prop3(self) -> None:
+        print("Gotta make this a multiline function for it to be a meaningful test")
         return None
 
     @enum.property
     def prop4(self) -> None:
+        print("I've run out of things to say")
         return None

crates/ruff_linter/src/rules/flake8_return/rules/function.rs

@@ -391,7 +391,7 @@ fn unnecessary_return_none(checker: &mut Checker, decorator_list: &[Decorator],
 }
 
 /// Determine whether `decorator` is `@property`,
-/// or another stdlib decorator similar to `@property.
+/// or another stdlib decorator similar to `@property`.
 ///
 /// TODO: be more principled here once we have type inference;
 /// hardcoding these is a little hacky.