[issue21677] Exception context set to string by BufferedWriter.close()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is a patch. It fixes also the same error in TextIOWrapper.

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assignee:  -> serhiy.storchaka
keywords: +patch
stage:  -> patch review
versions: +Python 2.7, Python 3.5
Added file: http://bugs.python.org/file35509/io_nonnormalized_error_on_close.patch

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