rm key_desc redundancy

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@42509 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.rast/main.c

@@ -59,7 +59,7 @@ int main(int argc, char **argv)
 
     vallist = G_define_option();
     vallist->key = "values";
-    vallist->key_desc = "value[,value[-value]]";
+    vallist->key_desc = "value[-value]";
     vallist->type = TYPE_STRING;
     vallist->required = NO;
     vallist->multiple = YES;