Fix list compare order

(a == b) != (b == a)

src/runtime/list.cpp

@@ -1013,7 +1013,7 @@ static inline int listContainsShared(BoxedList* self, Box* elt) {
         if (identity_eq)
             return true;
 
-        int r = PyObject_RichCompareBool(e, elt, Py_EQ);
+        int r = PyObject_RichCompareBool(elt, e, Py_EQ);
         if (r == -1)
             throwCAPIException();
 

test/tests/compare_order.py

+class A(object):
+    def __eq__(self, rhs):
+        return True
+
+class B(object):
+    def __eq__(self, lhs):
+        return False
+
+print A() == B()
+print B() == A()
+
+print A() in [B()]
+print B() in [A()]
+
+print A() in (B(),)
+print B() in (A(),)
+
+print A() in {B(): 1}
+print B() in {A(): 1}
+
+print A() in {B()}
+print B() in {A()}