fix typo in manual page

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@34924 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.out.ascii/v.out.ascii.html

@@ -18,7 +18,7 @@ companion module are useful both for importing and exporting vector
 maps between GRASS and other software, and for transferring data
 between machines.
 
-<o>
+<p>
 If the <b>format</b> parameter is set to <b>standard</b>, a GRASS
 ASCII vector map will be exported, which may contain a mix of
 primitives including points, lines, boundaries, centroids, areas,