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In the examples, `$' represents a typical shell prompt. It
precedes lines you should type; to make this more clear, those lines are
shown in this font, as opposed to lines which represent the
computer's response; those lines are shown in
this font, or
sometimes `like this'.
This document was generated by Sergey Poznyakoff on December, 17 2017 using texi2html 1.76.