Update pytest.exit docstring
Update pytest.exit docstring

Akasurde/pytest,txomon/pytest,ddboline/pytest,alfredodeza/pytest,The-Compiler/pytest,pfctdayelise/pytest,pytest-dev/pytest,tomviner/pytest,nicoddemus/pytest,nicoddemus/pytest,The-Compiler/pytest,tomviner/pytest,markshao/pytest,hackebrot/pytest,RonnyPfannschmidt/pytest