diff --git a/Doc/Sd1/arrays.xml b/Doc/Sd1/arrays.xml
index 9241282c29722fb27cf1c5ff83d461898e14f6fb..2895c746f9210e8ff6fef1e4f1174b08c6f10149 100644
--- a/Doc/Sd1/arrays.xml
+++ b/Doc/Sd1/arrays.xml
@@ -817,7 +817,7 @@ sort|toString: [Aaron, Eve, Mandy, Paul]</screen>
 // Precondition: Array must be ordered!
 ...println("sort|find(Mand): " + Arrays.binarySearch(names, "Mand"));
 ...println("sort|find(Mandy): " + Arrays.binarySearch(names, "Mandy"));
-...println("sort|find(Mandyer): " + Arrays.binarySearch(names, "Mandyer"));     </programlisting>
+...println("sort|find(Mandyer): " + Arrays.binarySearch(names, "Mandyer"));               </programlisting>
 
       <para>Result:</para>
 
@@ -1002,7 +1002,7 @@ l1.equals(l3):false</screen>
     <title>Extending an array</title>
 
     <figure xml:id="sd1_array_fig_arraysExtendArrayProblem">
-      <title>Extension problem</title>
+      <title>Lack of extendability</title>
 
       <programlisting language="none">final String[] member = {"Eve", "John", "Peter", "Jill"};
 
@@ -1402,7 +1402,8 @@ final int[] sortedValues = Arrays.copyOf(values, values.length);
 
                 <listitem>
                   <para>Like in the previous exercise the Junit tests are
-                  being masked by an <interfacename xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename>
+                  being masked by an <interfacename
+                  xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename>
                   annotation. After successful implementation they should be
                   enabled for test activation.</para>
                 </listitem>
@@ -1777,7 +1778,9 @@ Enter value #1 of 4: 1
                   <para>All tests would currently fail. Therefore the test
                   class
                   <classname>de.hdm_stuttgart.mi.sda1.console_sum.AppTest</classname>
-                  is being masked by an <interfacename xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename> annotation:</para>
+                  is being masked by an <interfacename
+                  xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename>
+                  annotation:</para>
 
                   <programlisting language="java">...
 <emphasis role="bold" xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</emphasis>
@@ -1794,7 +1797,9 @@ public class AppTest {
                   linkend="glo_IDE"/> and complete its implementation of
                   <methodname>de.hdm_stuttgart.mi.sda1.console_sum.App.prettifyOutput(int[]
                   values)</methodname> until all <xref linkend="glo_Junit"/>
-                  tests do succeed. Removing the <interfacename xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename> line will allow for testing your implementation.</para>
+                  tests do succeed. Removing the <interfacename
+                  xlink:href="https://junit.org/junit5/docs/current/api/org/junit/jupiter/api/Disabled.html">@Disabled</interfacename>
+                  line will allow for testing your implementation.</para>
                 </listitem>
               </itemizedlist>
             </tip>