Updated visibility function...

xtandard.c

@@ -421,7 +421,7 @@ int character_is_symbol (char character) {
 }
 
 int character_is_visible (char character) {
-	return ((int) ((character >= '!') && (character <= '~')));
+	return ((int) ((character >= ' ') && (character <= '~')));
 }
 
 int character_is_invisible (char character) {