Update default quotewidth to 80 in documentation

docs/pisg-doc.sgml

@@ -2036,7 +2036,7 @@
     </refsect1>
     <refsect1>
     <title>Default</title>
-    <para> 48</para>
+    <para> 80</para>
     </refsect1>
     </refentry>