bug#8519: 24.0.50; doc-view: allow pdftotext -layout instead of -raw

[Lars Ingebrigtsen]

trentbuck@gmail.com (Trent W. Buck) writes:

> doc-view supports using pdftotext on ttys.
> Unfortunately it is hard-coded to pass -raw.
> I would prefer to pass -layout.
>
> Please modify doc-view to allow me to support something like
>
>     (setq doc-view-pdftotext-program-args '("-layout" "-nopgbrk"))

Makes sense; I've now added this to Emacs 27.

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