fix-python-testlisted

When a Python test is failing, follow this loop precisely: 1. Run `pytest -q` via `shell_run` and read the tail of the output. The tail names the failing test + the offending line. 2. Use `grep` to find the function under test in the source tree. Read just the relevant lines of that file with `read`. 3. Apply the smallest possible patch with `edit` — `old` MUST match the file exactly once. Prefer changing a single operator or literal over rewriting a function. 4. Rerun `pytest -q` to confirm the suite is green. If a test still fails, go back to step 2 — do NOT pile more `edit` calls on top.