[issue42916] Support for DICOM image file format in imghdr module

[Ross Rhodes]

Change by Ross Rhodes <ross.rhodes at hotmail.co.uk>:


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keywords: +patch
nosy: +trrhodes
nosy_count: 2.0 -> 3.0
pull_requests: +23050
stage: needs patch -> patch review
pull_request: https://github.com/python/cpython/pull/24227

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42916>
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