This change caused python-gmpy2 tests to fail:
https://bugzilla.redhat.com/show_bug.cgi?id=1817710

Reproducer:
---
from __future__ import print_function, division
import doctest

filename = "doctest.txt"
with open(filename, "w") as fp:
    print("""
Test
====

    >>> all(x == 1 for x in [1, 1, 1])
    True
    """.strip(), file=fp)

result = doctest.testfile(filename, globs=globals())
print("result:", result)
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