update license comment

Author: Jesse Laning

argparse.h

@@ -1,15 +1,5 @@
 /**
- * argparse.h is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License v3 as published by
- * the Free Software Foundation.
- *
- * argparse.h 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 argparse.h.  If not, see <https://www.gnu.org/licenses/>.
+ * License: Apache 2.0 with LLVM Exception or GPL v3
  *
  * Author: Jesse Laning
  */

example.cpp

@@ -1,15 +1,5 @@
 /**
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License v3 as published by
- * the Free Software Foundation.
- *
- * 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/>.
+ * License: Apache 2.0 with LLVM Exception or GPL v3
  *
  * Author: Jesse Laning
  */

tests.cpp

@@ -1,3 +1,9 @@
+/**
+ * License: Apache 2.0 with LLVM Exception or GPL v3
+ *
+ * Author: Jesse Laning
+ */
+
 #include <cmath>
 #include <functional>
 #include <iostream>