作者 Ross Paterson。
.SH 著作権
Copyright \(co 2020 Free Software Foundation, Inc.
-License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+ライセンス GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
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This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.