Fixing issues with swap command and character input #1

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anthonykozar wants to merge 6 commits intoTryItOnline:masterfrom

anthonykozar:master

Commits on Nov 26, 2021

Fixed the swap command.
anthonykozar
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Commits on Nov 27, 2021

Only use termios if stdin is a tty. This fixes an exception that occurs when piping or redirecting input to the interpreter.
anthonykozar
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Moved solution in last commit from getch.py to gaot_plus_plus.py.
anthonykozar
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Commits on Dec 5, 2021

Commits on Dec 8, 2021

Prevented an exception caused by rotating an empty stack.
anthonykozar
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