tests/basics/builtin_range: Add test for corner case of range slicing.

tests/basics/builtin_range.py

@@ -38,6 +38,9 @@ print(range(1, 100, 5)[15:5:-3])
 print(range(100, 1, -5)[5:15:3])
 print(range(100, 1, -5)[15:5:-3])
 
+# for this case uPy gives a different stop value but the listed elements are still correct
+print(list(range(7, -2, -4)[2:-2:]))
+
 # zero step
 try:
     range(1, 2, 0)