diff --git a/Documentation/Models/Docbook/Gfdl/gfdl.docbook b/Documentation/Models/Docbook/Gfdl/gfdl.docbook
index f076362..89b468a 100644
--- a/Documentation/Models/Docbook/Gfdl/gfdl.docbook
+++ b/Documentation/Models/Docbook/Gfdl/gfdl.docbook
@@ -1,7 +1,5 @@
 <?xml version="1.0"?>
-<!DOCTYPE appendix PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
-    "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd"
-    []>
+<!DOCTYPE appendix PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" []>
 
 <appendix id="licenses-gfdl">