[issue11998] test_signal cannot test blocked signals if _tkinter is loaded; Tcl_Finalize()

[Roundup Robot]

Change by Roundup Robot <devnull at psf.upfronthosting.co.za>:


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pull_requests: +22379
pull_request: https://github.com/python/cpython/pull/23490

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue11998>
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