[issue45512] [sqlite3] simplify "isolation level"

[Erlend E. Aasland]

Change by Erlend E. Aasland <erlend.aasland at innova.no>:


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pull_requests: +27836
pull_request: https://github.com/python/cpython/pull/29593

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45512>
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