tests/cpydiff/core_class_mro: Move under Classes, add workaround.

tests/cpydiff/core_class_mro.py

@@ -0,0 +1,15 @@
+"""
+categories: Core,Classes
+description: Method Resolution Order (MRO) is not compliant with CPython
+cause: Depth first non-exhaustive method resolution order
+workaround: Avoid complex class hierarchies with multiple inheritance and complex method overrides. Keep in mind that many languages don't support multiple inheritance at all.
+"""
+class Foo:
+    def __str__(self):
+        return "Foo"
+
+class C(tuple, Foo):
+    pass
+
+t = C((1, 2, 3))
+print(t)

tests/cpydiff/core_mro.py

@@ -1,15 +0,0 @@
-"""
-categories: Core
-description: Method Resolution Order (MRO) is not compliant with CPython
-cause: Unknown
-workaround: Unknown
-"""
-class Foo:
-    def __str__(self):
-        return "Foo"
-
-class C(tuple, Foo):
-    pass
-
-t = C((1, 2, 3))
-print(t)