r.rgb: more keywords; fix example; r.blend manual: add r.rgb reference

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@68076 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r.blend/r.blend.html

@@ -20,13 +20,14 @@ d.rgb blue=elev_shade_blend.b green=elev_shade_blend.g red=elev_shade_blend.r
 <h2>SEE ALSO</h2>
 
 <em>
+<a href="d.shade.html">d.shade</a>,
+<a href="g.region.html">g.region</a>,
 <a href="r.shade.html">r.shade</a>,
+<a href="r.colors.html">r.colors</a>,
 <a href="r.his.html">r.his</a>,
 <a href="r.mapcalc.html">r.mapcalc</a>,
-<a href="r.colors.html">r.colors</a>,
-<a href="r.support.html">r.support</a>,
-<a href="d.shade.html">d.shade</a>,
-<a href="g.region.html">g.region</a>
+<a href="r.rgb.html">r.rgb</a>,
+<a href="r.support.html">r.support</a>
 </em>
 
 

scripts/r.rgb/r.rgb.html

@@ -7,7 +7,7 @@ raster map and its associated color table (grey255).
 
 <div class="code"><pre>
 g.region raster=elevation -p
-r.rgb input=elevation
+r.rgb input=elevation red=elevation.r green=elevation.g blue=elevation.b
 </pre></div>
 
 <p>

scripts/r.rgb/r.rgb.py

@@ -17,6 +17,8 @@
 #% description: Splits a raster map into red, green and blue maps.
 #% keyword: raster
 #% keyword: RGB
+#% keyword: separate
+#% keyword: split
 #%end
 #%option G_OPT_R_INPUT
 #%end