def charset_utf8(self, *a, **kw):
Replace string directly without appending to an empty string,
dataset/ETHPy150Open jonathanslenders/pymux/pymux/screen.py/BetterScreen.charset_utf8--crossover with--dataset/ETHPy150Open Eforcers/gae-flask-todo/lib/werkzeug/contrib/iterio.py/IterO._buf_append