Modules & Extensions: Install yast-registration if necessary (BSC#1251924)

Author: cwickert

xml/art_modules.xml

@@ -1175,6 +1175,13 @@
       </note>
       <procedure xml:id="pro-add-ons-extensions">
         <title>Installing add-ons and extensions from online channels with &yast;</title>
+        <step>
+          <para>
+            If it is not yet installed, install the <package>yast2-registration</package> package.
+            You can do this with <guimenu>&yast; Software</guimenu> or with on the command line:
+          </para>
+          <screen>&prompt.sudo;<command>zypper in yast2-registration</command></screen>.
+        </step>
         <step>
           <para>
             Start &yast; and select <menuchoice><guimenu>Software</guimenu> <guimenu>System
@@ -1442,7 +1449,7 @@
             Run <command>SUSEConnect --list-extensions</command> to get an overview of available
             extensions:
           </para>
-<screen os="sles">&prompt.user;sudo SUSEConnect --list-extensions
+<screen os="sles">&prompt.user;<command>sudo SUSEConnect --list-extensions</command>
 AVAILABLE EXTENSIONS AND MODULES
 
     Basesystem Module &product-ga; SP&product-sp; x86_64 (Activated)