[issue45467] Fix incremental decoder and stream reader in the "raw-unicode-escape" codec

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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dependencies: +UnicodeDecodeError: 'unicodeescape' codec can't decode byte 0x5c in position 8191: \ at end of string

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45467>
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