Unreported Tkinter test failure on Tk 8.7

gistfile1.txt

(Not sure if this is actually due to 8.7)

======================================================================
FAIL: test_create_polygon (test.test_tkinter.test_widgets.CanvasTest.test_create_polygon)
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Traceback (most recent call last):
  File "/Users/user/git/cpython/Lib/test/test_tkinter/test_widgets.py", line 861, in test_create_polygon
    self.assertEqual(c.bbox(i1), (19, 9, 61, 51))
AssertionError: Tuples differ: (18, 8, 62, 52) != (19, 9, 61, 51)

First differing element 0:
18
19

- (18, 8, 62, 52)
+ (19, 9, 61, 51)