switch num_mock_patch_args to do identity checks for the sentinels
switch num_mock_patch_args to do identity checks for the sentinels

tomviner/pytest,pytest-dev/pytest,tomviner/pytest,nicoddemus/pytest,Akasurde/pytest,The-Compiler/pytest,nicoddemus/pytest,RonnyPfannschmidt/pytest,markshao/pytest,The-Compiler/pytest,alfredodeza/pytest