[issue32097] doctest does not consider \r\n a <BLANKLINE>

[Bert JW Regeer]

New submission from Bert JW Regeer <bertjw at regeer.org>:

doctest fails to consider `\r\n` as a blank line.

----------
components: Library (Lib)
files: test.py
messages: 306595
nosy: X-Istence
priority: normal
severity: normal
status: open
title: doctest does not consider \r\n a <BLANKLINE>
versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7, Python 3.8
Added file: https://bugs.python.org/file47280/test.py

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32097>
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