Comment in <info> avoiding Xmlming collapsing bug

Doc/lectures.xml

@@ -8,15 +8,15 @@
       xmlns:m="http://www.w3.org/1998/Math/MathML"
       xmlns:html="http://www.w3.org/1999/xhtml"
       xmlns:db="http://docbook.org/ns/docbook">
-  <!--ToDo:
+  <info>
+    <title>Lecture notes</title>
+
+    <!--ToDo:
 -Moving Ex. 102 (Distinguishing leap- and non-leap years) after unit test introduction
 
 
 -->
 
-  <info>
-    <title>Lecture notes</title>
-
     <author>
       <personname
       xlink:href="https://www.hdm-stuttgart.de/mi/kontakt/dozenten#goik"><firstname>Martin</firstname>