pythongh-120713: test that a 0-padded year with century is guaranteed

Author: blhsing

Lib/test/datetimetester.py

@@ -1699,16 +1699,7 @@ def test_bool(self):
     def test_strftime_y2k(self):
         for y in (1, 49, 70, 99, 100, 999, 1000, 1970):
             d = self.theclass(y, 1, 1)
-            # Issue 13305:  For years < 1000, the value is not always
-            # padded to 4 digits across platforms.  The C standard
-            # assumes year >= 1900, so it does not specify the number
-            # of digits.
-            if d.strftime("%Y") != '%04d' % y:
-                # Year 42 returns '42', not padded
-                self.assertEqual(d.strftime("%Y"), '%d' % y)
-                # '0042' is obtained anyway
-                if support.has_strftime_extensions:
-                    self.assertEqual(d.strftime("%4Y"), '%04d' % y)
+            self.assertEqual(d.strftime("%4Y"), '%04d' % y)
 
     def test_replace(self):
         cls = self.theclass