Update test_datetime.py

Author: kots14

lib/matplotlib/tests/test_datetime.py

@@ -95,16 +95,16 @@ def test_bar(self):
 
         x_dates = np.array(
             [
-                datetime(2020, 6, 30),
-                datetime(2020, 7, 22),
-                datetime(2020, 8, 3),
-                datetime(2020, 9, 14),
+                datetime.datetime(2020, 6, 30),
+                datetime.datetime(2020, 7, 22),
+                datetime.datetime(2020, 8, 3),
+                datetime.datetime(2020, 9, 14),
             ],
             dtype=np.datetime64,
         )
         x_ranges = [8800, 2600, 8500, 7400]
 
-        x = np.datetime64(datetime(2020, 6, 1))
+        x = np.datetime64(datetime.datetime(2020, 6, 1))
         ax1.bar(x_dates, x_ranges, width=np.timedelta64(4, "D"))
         ax2.bar(np.arange(4), x_dates, bottom=x)