diff --git a/Doc/lectures.xml b/Doc/lectures.xml
index a375424baebe20fe4118e1e7630823f500717e15..57d6e9d11daf6ba7b64221bd4cd56edb2767b1f8 100644
--- a/Doc/lectures.xml
+++ b/Doc/lectures.xml
@@ -1,20 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<book version="5.1" xmlns="http://docbook.org/ns/docbook"
-      xmlns:xlink="http://www.w3.org/1999/xlink"
-      xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
-      xmlns:xi="http://www.w3.org/2001/XInclude"
-      xmlns:trans="http://docbook.org/ns/transclusion"
-      xmlns:svg="http://www.w3.org/2000/svg"
-      xmlns:m="http://www.w3.org/1998/Math/MathML"
-      xmlns:html="http://www.w3.org/1999/xhtml"
-      xmlns:db="http://docbook.org/ns/docbook">
+<book version="5.1" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes" xmlns:xi="http://www.w3.org/2001/XInclude" xmlns:trans="http://docbook.org/ns/transclusion" xmlns:svg="http://www.w3.org/2000/svg" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:db="http://docbook.org/ns/docbook">
   <info>
     <title>Lecture notes</title>
 
     <author>
-      <personname
-      xlink:href="https://www.hdm-stuttgart.de/mi/kontakt/dozenten#goik"><firstname>Martin</firstname>
-      <surname>Goik</surname></personname>
+      <personname xlink:href="https://www.hdm-stuttgart.de/mi/kontakt/dozenten#goik"><firstname>Martin</firstname> <surname>Goik</surname></personname>
 
       <affiliation>
         <address><link xlink:href="https://www.hdm-stuttgart.de/english">Stuttgart Media University / MI</link></address>
@@ -30,16 +20,13 @@
         <colgroup width="13%"/>
 
         <tr>
-          <td rowspan="3"><link
-          xlink:href="https://creativecommons.org/licenses/#licenses"><inlinemediaobject>
+          <td rowspan="3"><link xlink:href="https://creativecommons.org/licenses/#licenses"><inlinemediaobject>
               <imageobject>
                 <imagedata fileref="Sd1/Ref/Fig/creativeCommons.svg"/>
               </imageobject>
             </inlinemediaobject></link></td>
 
-          <th>Published under the terms of the <link
-          xlink:href="https://creativecommons.org/licenses/by/4.0/legalcode">Creative
-          Commons Attribution 4.0 International Public License</link>.</th>
+          <th>Published under the terms of the <link xlink:href="https://creativecommons.org/licenses/by/4.0/legalcode">Creative Commons Attribution 4.0 International Public License</link>.</th>
 
           <th rowspan="3"><mediaobject>
               <imageobject>
@@ -49,16 +36,11 @@
         </tr>
 
         <tr>
-          <th colspan="1">Available as <link
-          linkend="prefaceFormatHtmlWebhelp">HTML</link>, <link
-          linkend="prefaceFormatZip">zipped HTML</link>, <link
-          linkend="prefaceFormatEpub">EPUB</link> and <link
-          linkend="prefaceFormatPdf">PDF</link>.</th>
+          <th colspan="1">Available as <link linkend="prefaceFormatHtmlWebhelp">HTML</link>, <link linkend="prefaceFormatZip">zipped HTML</link>, <link linkend="prefaceFormatEpub">EPUB</link> and <link linkend="prefaceFormatPdf">PDF</link>.</th>
         </tr>
 
         <tr>
-          <th colspan="1">Source code provided at <uri
-          xlink:href="https://gitlab.mi.hdm-stuttgart.de/goik/GoikLectures">https://gitlab.mi.hdm-stuttgart.de/goik/GoikLectures</uri></th>
+          <th colspan="1">Source code provided at <uri xlink:href="https://gitlab.mi.hdm-stuttgart.de/goik/GoikLectures">https://gitlab.mi.hdm-stuttgart.de/goik/GoikLectures</uri></th>
         </tr>
       </informaltable>
     </legalnotice>
@@ -71,70 +53,43 @@
 
     <itemizedlist>
       <listitem xml:id="prefaceFormatHtmlWebhelp">
-        <para><link
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp">Online
-        documentation</link> based on the <productname
-        xlink:href="http://docbook.sourceforge.net/release/xsl/current/webhelp/docs">Web
-        help</productname> format.</para>
+        <para><link xlink:href="https://freedocs.mi.hdm-stuttgart.de/webhelp">Online documentation</link> based on the <productname xlink:href="http://docbook.sourceforge.net/release/xsl/current/webhelp/docs">Web help</productname> format.</para>
       </listitem>
 
       <listitem xml:id="prefaceFormatEpub">
-        <para><filename
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.epub">lectures.epub</filename>
-        featuring the <xref linkend="glo_EPUB"/> 3 format containing <xref
-        linkend="glo_SVG"/> images and MathML formulas based on <link
-        xlink:href="https://www.mathjax.org">MathJax JavaScript</link>
-        rendering.</para>
+        <para><filename xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.epub">lectures.epub</filename> featuring the <xref linkend="glo_EPUB"/> 3 format containing <xref linkend="glo_SVG"/> images and MathML formulas based on <link xlink:href="https://www.mathjax.org">MathJax JavaScript</link> rendering.</para>
 
         <caution>
-          <para><productname
-          xlink:href="https://en.wikipedia.org/wiki/EPUB">Epub</productname>
-          reader applications do vary supporting <xref linkend="glo_EPUB"/>
-          3.0 (e.g. formulas and <xref linkend="glo_SVG"/> images). Reader
-          apps known to work well:</para>
+          <para><productname xlink:href="https://en.wikipedia.org/wiki/EPUB">Epub</productname> reader applications do vary supporting <xref linkend="glo_EPUB"/> 3.0 (<abbrev>e.g.</abbrev> formulas and <xref linkend="glo_SVG"/> images). Reader apps known to work well:</para>
         </caution>
 
         <para>Reader apps known to work well:</para>
 
         <itemizedlist>
           <listitem>
-            <para><link xlink:href="http://gitden.com">Gitden
-            reader</link></para>
+            <para><link xlink:href="http://gitden.com">Gitden reader</link></para>
           </listitem>
 
           <listitem>
-            <para><link
-            xlink:href="https://www.calibre-ebook.com">Calibre</link></para>
+            <para><link xlink:href="https://www.calibre-ebook.com">Calibre</link></para>
           </listitem>
 
           <listitem>
-            <para>The author very much welcomes hints to appropriate <xref
-            linkend="glo_EPUB"/> reader software accessing these pages.</para>
+            <para>The author very much welcomes hints to appropriate <xref linkend="glo_EPUB"/> reader software accessing these pages.</para>
           </listitem>
         </itemizedlist>
       </listitem>
 
       <listitem xml:id="prefaceFormatPdf">
-        <para><filename
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.pdf">lectures.pdf</filename>
-        featuring the <xref linkend="glo_PDF"/> format (hopefully) providing
-        improved printout typography.</para>
+        <para><filename xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.pdf">lectures.pdf</filename> featuring the <xref linkend="glo_PDF"/> format (hopefully) providing improved printout typography.</para>
 
         <caution>
-          <para>These lecture notes are heavily based both on external links
-          and video resources. Using <xref linkend="glo_PDF"/> thus imposes
-          media related limitations.</para>
+          <para>These lecture notes are heavily based both on external links and video resources. Using <xref linkend="glo_PDF"/> thus imposes media related limitations.</para>
         </caution>
       </listitem>
 
       <listitem xml:id="prefaceFormatZip">
-        <para>Self contained zip archive <link
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.zip">lectures.zip</link>
-        of above resources for offline usage excluding <filename
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.pdf">lectures.pdf</filename>
-        and <filename
-        xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.epub">lectures.epub</filename>
-        .</para>
+        <para>Self contained zip archive <link xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.zip">lectures.zip</link> of above resources for offline usage excluding <filename xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.pdf">lectures.pdf</filename> and <filename xlink:href="https://freedocs.mi.hdm-stuttgart.de/lectures.epub">lectures.epub</filename> .</para>
       </listitem>
     </itemizedlist>
   </preface>
@@ -160,8 +115,7 @@
 
     <xi:include href="Sd1/workingWithNumbers.xml" xpointer="element(/1)"/>
 
-    <xi:include href="Sd1/interfacesAbstractClasses.xml"
-                xpointer="element(/1)"/>
+    <xi:include href="Sd1/interfacesAbstractClasses.xml" xpointer="element(/1)"/>
 
     <xi:include href="Sd1/deployment.xml" xpointer="element(/1)"/>