tests/basics: Add more tuple tests to improve coverage testing.

tests/basics/tuple_mult.py

@@ -10,3 +10,9 @@ for i in (-4, -2, 0, 2, 4):
 a = (1, 2, 3)
 c = a * 3
 print(a, c)
+
+# unsupported type on RHS
+try:
+    () * None
+except TypeError:
+    print('TypeError')