[PATCH v2] timezone: Enhance tst-bz28707 diagnostics

[Paul Eggert]

On 2025-04-04 03:45, Florian Weimer wrote:
> +  errno = 0;
>     tzset ();
> +  if (errno != 0)
> +    printf ("warning: tzset set errno to %d (%m)", errno);

I don't know why this part of the patch is useful, as tzset's effect on 
errno is unspecified. If this part is useful, please add an explanatory 
comment.

Otherwise the patch looks good, thanks.