[freeciv-data] (PR#2406) In help, Rivers are indexed under mountains

Actually, I haven't used the original version, but I fixed it in the Finnish 
translation, so this correction should work similarly and bring rivers at
the same level as other terrain types:


--- client/helpdata.c~	Sat Oct 12 02:35:11 2002
+++ client/helpdata.c	Wed Nov 20 20:06:40 2002
@@ -276,7 +276,7 @@
 	  /* Add special Civ2-style river help text if it's supplied. */
 	  if (terrain_control.river_help_text) {
 	    pitem = new_help_item(HELP_TEXT);
-	    pitem->topic = mystrdup(_("  Rivers"));
+	    pitem->topic = mystrdup(_(" Rivers"));
 	    strcpy(long_buffer, _(terrain_control.river_help_text));
 	    wordwrap_string(long_buffer, 68);
 	    pitem->text = mystrdup(long_buffer);