Because deliberately obtuse hn comments do not benefit anyone: line buffers are copied on fork and flushed on exit, so you get two 'choo's. If you add a \n it g

Because deliberately obtuse hn comments do not benefit anyone: line buffers are copied on fork and flushed on exit, so you get two 'choo's. If you add a \n it goes down to just one because it flushes on newline.