r.stats: Add missing HTML tag in manual

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@74280 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.stats/r.stats.html

@@ -175,6 +175,8 @@ r.stats -c input=landclass96,zipcodes separator=comma
 
 # landuse/landcover, geology and zipcodes with category labels
 r.stats -c input=landclass96,zipcodes,geology_30m separator=comma -l
+</pre></div>
+
 <h2>SEE ALSO</h2>
 
 <em>