Writes to stdout during hidden state of the spinner should be flushed somehow

[pavdmyt]

Writes to stdout when spinner is in hidden state (using Yaspin.hide) should explicitly contain a newline character \n in order to flush the stdout. Consider this example:

import sys
import time

from yaspin import yaspin

with yaspin(text='Downloading images') as sp:
    # task 1
    time.sleep(1)
    sp.hide()
    sys.stdout.write('> image 1 download complete\n')
    sp.show()

    # task 2
    time.sleep(2)
    sp.hide()
    sys.stdout.write('> image 2 download complete\n')
    sp.show()

It is desirable that library handles this by itself. One of the possible approach is to monitor stdout of the process which utilizes yaspin. Here some relevant discussions I've found:

• https://stackoverflow.com/questions/5173945/python-monitoring-stderr-and-stdout-of-a-subprocess
• https://stackoverflow.com/questions/4417546/constantly-print-subprocess-output-while-process-is-running

Somewhat similar functionality is also implemented in capsys fixture from pytest.