[issue33529] [security] Infinite loop on folding email (_fold_as_ew()) if an header has no spaces

[STINNER Victor]

Change by STINNER Victor <vstinner at redhat.com>:


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pull_requests: +14004
pull_request: https://github.com/python/cpython/pull/14162

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33529>
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