crecord: use try/except for import of curses Not only does this improve fragility with 'if os.name == ...' it will help future patches enable the behavior to fallback to use plain record when curses is unavailable (e.g. python compiled without curses support).

histedit: only use pickle if not using the modern save format This avoids a case where PyPy's cPickle module throws a more confusing error than CPython's.