minor wording

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@55121 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/r.terraflow/main.cpp

@@ -113,8 +113,9 @@ parse_args(int argc, char *argv[]) {
   d8cut->label = _("Routing using SFD (D8) direction");
   d8cut->description = 
     _("If flow accumulation is larger than this value it is routed using "
-      "SFD (D8) direction (meaningfull only  for MFD flow). No answer for infinity.");
-  
+      "SFD (D8) direction (meaningfull only for MFD flow). "
+      "If no answer is given it defaults to infinity.");
+
   /* main memory */
   struct Option *mem;
   mem = G_define_option() ;