* integration/bash: Add copyright notice.

integration/bash

@@ -1,3 +1,22 @@
+# integration/bash --- Bash integration
+
+# Copyright (C) 2022 Akib Azmain Turja.
+
+# This file is not part of GNU Emacs.
+
+# This file 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, 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.
+
+# For a full copy of the GNU General Public License
+# see <https://www.gnu.org/licenses/>.
+
 __eat_prompt_command () {
   # Send the current working directory, for directory tracking.
   printf "\\e]7;file://%s%s\\e\\\\" "$HOSTNAME" "$PWD"