Implement is ascii equivalently to the reference
Implement is ascii equivalently to the reference: a task in repo2rlenv-equivalence-tests (Harbor dataset). Implement the function is ascii in /workspace/task module.py so that it is behaviorally equivalent to reference is ascii (which is already provided in task module.py ).
The task
Implement the function `is_ascii` in `/workspace/task_module.py` so that it is behaviorally equivalent to `reference_is_ascii` (which is already provided in `task_module.py`).