change redisplay to handle some cases where the line consumes more than the number of physical screen lines; add regerror() error messages if regular expression compilation fails; make sure active region readline variables are displayed with bind -v; partial fix for bind -x and commands containing quoting characters

bashline.c

@@ -4583,7 +4583,7 @@ print_unix_command_map (void)
   save = rl_get_keymap ();
   cmd_xmap = get_cmd_xmap_from_keymap (save);
   rl_set_keymap (cmd_xmap);
-  rl_macro_dumper (1);
+  rl_macro_dumper (-1);
   rl_set_keymap (save);
   return 0;
 }