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Quines, error quines, hello world, polyglots, oh my!
Introduction
A quine is a program that outputs its own source code. For example, a well-known Python quine is _="_=%r;print(_%%_,end='')";print(_%_,end=''). Running it outputs _="_=%r;print(_%%_,end='')";print(_%_,end=''), therefore it is a val...