[issue35603] table header in output of difflib.HtmlDiff.make_table is not escaped and can be rendered as code in the browser

[Serhiy Storchaka]

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


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pull_requests: +10667, 10668

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35603>
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