bash-5.1 distribution sources and documentation

tests/dstack.tests

@@ -1,8 +1,21 @@
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
 export LC_ALL=C
 export LANG=C
 
 dirs -c
-# error -- nonexistant directory
+# error -- non-existent directory
 pushd /tmp/xxx-notthere
 
 # errors -- empty stack