[3.13] gh-143672: Add more tests for struct.pack_into() (GH-143901)#143903

serhiy-storchaka merged 1 commit intopython:3.13python/cpython:3.13from

miss-islington:backport-66680f1-3.13miss-islington/cpython:backport-66680f1-3.13Copy head branch name to clipboard