[3.9] bpo-42924: Fix incorrect copy in bytearray_repeat (GH-24208) #24211
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Before, using the * operator to repeat a bytearray would copy data from the start of
the internal buffer (ob_bytes) and not from the start of the actual data (ob_start).
(cherry picked from commit 61d8c54)
Co-authored-by: Tobias Holl TobiasHoll@users.noreply.github.com
https://bugs.python.org/issue42924