Correct input option name

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@53832 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster3d/r3.out.ascii/r3.out.ascii.html

@@ -1,6 +1,6 @@
 <h2>DESCRIPTION</h2>
 
-Outputs 3D raster maps in ASCII format. The <em>map</em> parameter is
+Exports 3D raster maps in ASCII format. The <em>input</em> parameter is
 a valid 3D raster map in the current mapset search path. The <em>output</em> 
 parameter is the name of an ASCII file which will be written in the 
 current working directory.