bug#29759: 25.2; "exciting footnote styles" promised, but unavailable

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 17 Dec 2017 16:31:14 -0500
> From: Boruch Baum <boruch_baum@gmx.com>
> 
> The docstring for variable `footnote-style-alist' promises, "See
> footnote-han.el, footnote-greek.el and footnote-hebrew.el for more
> exciting styles"; However, those files neither seem to be installed with
> emacs, nor appear when I perform a google search for them.

I've removed that reference on the release branch.

> The code update renames the style to 'hebrew-numeric', adds a second
> (rarely used) style, and comments a failed attempt to improve the style
> regex.

Thanks, pushed to the master branch.

(Of course, to have Hebrew-style footnotes be rendered correctly,
starting at the left side of the window, one needs to either replace
the "Footnotes" header with something like "הערות שוליים", or insert a
newline after "Footnotes:".  But footnote.el doesn't yet support
localized headers.)