Header lint (#1444)

* Add eslint-plugin-header

* Add rule for header format

* Add missing header

* Fix header issues

1 files changed, 17 insertions, 0 deletions

diff --git a/test/data/html/test-document2-script.js b/test/data/html/test-document2-script.js
index 01bc211f..8e381b09 100644
--- a/test/data/html/test-document2-script.js
+++ b/test/data/html/test-document2-script.js
@@ -1,3 +1,20 @@
+/*
+ * Copyright (C) 2021  Yomichan Authors
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
 function requestFullscreen(element) {
     if (element.requestFullscreen) {
         element.requestFullscreen();