diff --git a/container-guide/articles/Container-guide.asm.xml b/container-guide/articles/Container-guide.asm.xml
index f03ac116..e134531b 100644
--- a/container-guide/articles/Container-guide.asm.xml
+++ b/container-guide/articles/Container-guide.asm.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?xml-model href="http://docbook.org/xml/5.2/rng/assembly.rnc" type="application/relax-ng-compact-syntax"?>
 <?xml-model href="http://docbook.org/xml/5.2/sch/assembly.sch" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>
+
 <!DOCTYPE assembly
 [
     <!ENTITY % entities SYSTEM "../common/generic-entities.ent">