[Bug regex/23393] Handle [a-z] and [A-Z] in consistent portable fashion regardless of locale.

[carlos at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23393

Carlos O'Donell <carlos at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://bugzilla.redhat.com
                   |                            |/show_bug.cgi?id=1631472

--- Comment #38 from Carlos O'Donell <carlos at redhat dot com> ---
(In reply to Carlos O'Donell from comment #35)
> As a temprary measure I have committed the deinterleaving of upper and lower
> cases in iso14651_t1_common for glibc 2.28 to fix the surprises caused to
> en_US.UTF-8 users who do not want to have [a-z] match A-Y.
> 
> This fixes the regression for 2.28, but doesn't fix this issue.

There is a user report [1] that [a-z] range matching is broken for sv_SE, and
this is expected, the commit 159738548130d5ac4fe6178977e940ed5f8cfdc4 by Mike
Fabian in upstream harmonized the collation with CLDR but changed CEO such that
[a-z] no longer works as expected. This will be fixed by a full fix to this
issue.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1631472

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