[tz] zdump bug?

[Paul Eggert]

Matt Johnson wrote:
> zdump ./New_York
> 
> The output is missing the abbreviation:
> ./New_York  Sun Oct 28 22:23:48 2018

That's an old zdump, or one built with some non-default build-time flags. The 
current zdump (2018g), if built in the default way, behaves like this:

$ zdump ./New_York || echo failed $?
./New_York: No such file or directory
failed 1

which at least lets you know that zdump isn't doing what you thought it would do.