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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright © 2007 Free Software Foundation, Inc. <http s ://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this license
document, but changing it is not allowed.
Preamble
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short notice like
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The hypothetical commands `show w' and `show c' should show the appropriate
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