[issue30591] textwrap: placeholder backtracking special case lacks test coverage

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset 5edf827c8052958b9d293f75ce8d93b66c1d58da by Serhiy Storchaka (Jonathan Eunice) in branch 'master':
bpo-30591: Added test for textwrap backtracking. (#1988)
https://github.com/python/cpython/commit/5edf827c8052958b9d293f75ce8d93b66c1d58da


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nosy: +serhiy.storchaka

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