r.water.outlet manual: example expanded

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@69714 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.water.outlet/r.water.outlet.html

@@ -45,6 +45,9 @@ d.rast map=basin_A30
 # overlay with transparency
 r.colors map=basin_A30 color=grey
 d.his h=accum_5K i=basin_A30
+
+# report outlet size in ha
+r.report map=basin_A30 units=h
 </pre></div>
 
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