Include missing phrase from copyright
diff --git a/coders/debug.h b/coders/debug.h
index 20b4d47..4ea296f 100644
--- a/coders/debug.h
+++ b/coders/debug.h
@@ -2,7 +2,7 @@
Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization
dedicated to making software imaging solutions freely available.
- You may not use this file except in compliance with the License.
+ You may not use this file except in compliance with the License. You may
obtain a copy of the License at
https://imagemagick.org/script/license.php
