[Bug localedata/17750] wrong collation order of diacritics in most locales

["egmont at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17750

Egmont Koblinger <egmont at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |egmont at gmail dot com

--- Comment #11 from Egmont Koblinger <egmont at gmail dot com> ---
This change broke (among others) the Hungarian locales (see 18934).

I totally agree with Alexandre's opinion (the assumptions made by the patch
being wrong on so many levels); extending with a fifth one:

Even if there are some French words present in a list, if you're using a
certain language then the alphabetical rules of that language should apply, not
the French one. This is what locale definitions are about. Define in the French
locales the way to sort words on a French UI, but please leave the other
locales alone.

I'm disappointed that such a change that was doomed to break so many locales
managed to make it into glibc. But I think that in the end it boils down to the
lack of proper unittest coverage.

In the above mentioned bug I created an extensive unittest for Hungarian, one
that points to the official rules of alphabetical sorting and takes the
examples from that (plus many more), and would have failed with this change.

I encourage maintainers of locale files to come up with similarly extensive
unittests.

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