[docs] [issue35781] `logger.warn` method is used in "Logging HOWTO" documentation though `logger.warn` method is deprecated in Python 3.7

[Vinay Sajip]

Vinay Sajip <vinay_sajip at yahoo.co.uk> added the comment:


New changeset 3be19c082b7f0ba3cf6c28922d3577126871788e by Vinay Sajip (Miss Islington (bot)) in branch '3.7':
bpo-35781: Changed references to deprecated 'warn' method in logging documentation in favour of 'warning' (GH-11654) (GH-11657)
https://github.com/python/cpython/commit/3be19c082b7f0ba3cf6c28922d3577126871788e


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