Resolve issue #22 doubled output#23

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joemcool wants to merge 2 commits intogeekfactory:masterfrom

joemcool:issue22-one_writer

Commits on Nov 13, 2021

Fixed issue #22 so shell_putc() only prints once when using buffered output
joemcool
committed
Set shell_writter to 0 when using buffered output
joemcool
committed