Flush standard output after help is written (fix #4102)
(cherry picked from commit f5ac248b3ab9a70dc43ec8f8b9063aa200d94136)
Signed-off-by: Sébastien Escudier <sebastien-devel@celeos.eu>
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(cherry picked from commit f5ac248b3ab9a70dc43ec8f8b9063aa200d94136)
Signed-off-by: Sébastien Escudier <sebastien-devel@celeos.eu>