Issue #16045: add more unit tests for built-in int()

Patch by Chris Jerdonek.
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 1d35a6a..d75c44a 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -680,6 +680,8 @@
 
     # Test input() later, together with raw_input
 
+    # test_int(): see test_int.py for int() tests.
+
     def test_intern(self):
         self.assertRaises(TypeError, intern)
         # This fails if the test is run twice with a constant string,