[tz] Gripe about compressed rule set names in tzdata.zi

[Paul Eggert]

On 05/09/2018 11:21 AM, Tom Lane wrote:
> addition or deletion of a ruleset near the beginning of the file creates
> semantically-insignificant changes throughout the rest of the file,
> making it hard to review the diffs to get a sense of what changed,
> or to eyeball-validate the .zi file.


I haven't been eyeballing tzdata.zi myself, as it wasn't designed to be 
readable. Instead, I run "make check_tzs", which compares zdump output, 
and I eyeball that.

We could make tzdata.zi more readable along the lines that you suggest, 
presumably as a runtime option to zishrink.awk and a corresponding 
Makefile macro to let builders select whether they want tzdata.zi to be 
smaller and less-readable, or larger and more-readable.