Fix :help 'ln' formatting.

common/locale/en-US/options.xml

@@ -1053,7 +1053,12 @@
     <tags>'ln' 'linenumbers'</tags>
     <spec>'linenumbers' 'ln'</spec>
     <type>&option.linenumbers.type;</type>
-    <default>&option.linenumbers.default;</default>
+    <default><![CDATA[code.google.com:'#nums [id^="nums_table"] a[href^="#"]',
+          github.com:.line_numbers>*,
+          mxr.mozilla.org:a.l,
+          pastebin.com:#code_frame>div>ol>li,
+          addons.mozilla.org:.gutter>.line>a,
+          *:'/* Hgweb/Gitweb */ .completecodeline a.codeline, a.linenr']]></default>
     <description>
         <p>
             Patterns used to determine line numbers used by <k>G</k>. May be