g.parser: add -n to synopsis section

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@62766 15284696-431f-4ddb-bdfa-cd5b030d7da7

general/g.parser/g.parser.html

@@ -3,7 +3,7 @@
 
 <h2>SYNOPSIS</h2>
 <b>g.parser --help</b><br>
-<b>g.parser</b> [-<b>s</b>] [-<b>t</b>] <em>filename</em> [<em>argument</em>,...]
+<b>g.parser</b> [-<b>s</b>] [-<b>t</b>]  [-<b>n</b>] <em>filename</em> [<em>argument</em>,...]
 
 <h3>Flags:</h3>
 <dl>