Re: master 45a1653: ; Fix last change to bibtex.el

[Glenn Morris]

> commit 45a1653afa8eb0032908bc94b5466604f84805d5

> diff --git a/lisp/textmodes/bibtex.el b/lisp/textmodes/bibtex.el
> index b69d715..d53cfa0 100644
> --- a/lisp/textmodes/bibtex.el
> +++ b/lisp/textmodes/bibtex.el

[...]

> -              (function :tag "Conversion function")))
> -(make-variable-buffer-local 'bibtex-unify-case-convert)
> +                 (function :tag "Conversion function"))
> +  :local t)

After this change:

bibtex-unify-case-convert:
  Its value is nil
  Original value was ‘identity’

The "nil" value causes a test failure: https://hydra.nixos.org/build/130666989

(Perhaps defcustom's recently added :local feature, of which this is the
only user, is broken.)