ParsedException drops anchor lines from Python 3.11+ tracebacks

ParsedException drops anchor lines from Python 3.11+ tracebacks: a task in Repo2RLEnv R2E-Gym / SWEGEN (Harbor dataset). When parsing a traceback that contains anchor lines (the ^ and ~ highlight lines introduced in Python 3.11+), ParsedException.from string silently discards them. As a result…