bug#2385: bibtex autokey no longer ignores uncapitalized title words

[era eriksson]

Package: emacs
Version: 23.0.90.1

I'm taking the liberty to forward the following bug from the Ubuntu
Launchpad:

https://bugs.launchpad.net/ubuntu/+source/emacs22/+bug/243156

> What I Expected to Happen
> ====================
> 
> This affects the BibTeX mode. Emacs 20 changed the behaviour, thus:
> 
> *** Autokey generation now uses all words from the title, not just
> capitalized words. To avoid conflicts with existing customizations,
> bibtex-autokey-titleword-ignore is set up such that words starting 
> with lowerkey characters will still be ignored. Thus, if you want to 
> use lowercase words from the title, you will have to overwrite the 
> bibtex-autokey-titleword-ignore standard setting.
> 
> So for an entry
> 
> @InProceedings{,
>   author = {Ganter, Bernhard and Kuznetsov, Sergei O.},
>   title = {Stepwise Construction of the {Dedekind-MacNeille}
>                    Completion},
>   year = 1998,
>   booktitle = {ICCS '98: Proceedings of the 6th International 
>               Conference on Conceptual Structures},
>   pages = {295--302},
>   address = {Montpellier, France},
>   publisher = {Springer-Verlag},
>   isbn = {3-540-64791-0}
> }
> 
> pressing C-c C-c should generate and add the key
> 
>     ganter98:_stepw_const_dedek_macneil_compl
> 
> instead it generates
> 
>   ganter98:_stepw_const_of_dedek_macneil_compl
> 
> In emacs21
> =========
> 
> The variable `bibtex-autokey-titleword-ignore` is set to
> 
>   '("A" "An" "On" "The" "Eine?" "Der" "Die" "Das"
>     "[^A-Z].*" ".*[^a-zA-Z0-9].*")
> 
> and it works as expected.
> 
> In emacs22
> =========
> 
> The variable `bibtex-autokey-titleword-ignore` is set to
> 
>   '("A" "An" "On" "The" "Eine?" "Der" "Die" "Das"
>     "[^[:upper:]].*" ".*[^[:upper:]0-9].*")
> 
> and it does not work as expected.
> 
> Workaround
> =========
> 
> The old value from emacs21 does not solve the problem, instead I have > to 
> enumerate all prepositions and conjunctions.

I have verified this bug with Emacs snapshot 1:20090207-1~intrepid1 from
https://launchpad.net/~ubuntu-elisp/+archive/ppa

Attached below please find a patch for Emacs 23.

/* era */

-- 
If this were a real .signature, it would suck less.  Well, maybe not.

bibtex-snapshot-el.patch
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