User manual: Add 2020 to copyright date

[pspp] / doc / concept-index.texi

diff --git a/doc/concept-index.texi b/doc/concept-index.texi
index cf3288d9a1bb4bcee441ce358e5d4f24913714c3..86bcb81bc742160a233c7ae06c42349028784dcf 100644 (file)
--- a/doc/concept-index.texi
+++ b/doc/concept-index.texi
@@ -1,5 +1,5 @@
 @c PSPP - a program for statistical analysis.
-@c Copyright (C) 2017 Free Software Foundation, Inc.
+@c Copyright (C) 2017, 2020 Free Software Foundation, Inc.
 @c Permission is granted to copy, distribute and/or modify this document
 @c under the terms of the GNU Free Documentation License, Version 1.3
 @c or any later version published by the Free Software Foundation;