Fixed that without these two line, on `A ; B` somtimes B's output seems not to be flushed.
Fixed that without these two line, on `A ; B` somtimes B's output seems not to be flushed.

zetamatta/nyagos,kissthink/nyagos,kissthink/nyagos,hattya/nyagos,tsuyoshicho/nyagos,nocd5/nyagos,tyochiai/nyagos,hattya/nyagos,hattya/nyagos,kissthink/nyagos