bug#45390: Shell-script mode doesn’t like redirection at beginning of command

[Lars Ingebrigtsen <larsi@gnus.org>]

Dario Gjorgjevski <dario.gjorgjevski@gmail.com> writes:

> The “for” and “echo” in the following example are not font-locked in
> shell-script mode, despite being syntactically valid.  (From my
> experience, the “>&2 echo ...” idiom is quite common in practice, too.)
>
>     >/dev/null for i in {1..5} ; do
>         echo $i
>     done
>     >&2 echo 'Error!'
>
> Additionally, the “for” and its “done” are not matched so the SMIE
> grammar also needs fixing.

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

I'm unable to reproduce most of this -- do/done seem to be matched, and
echo is font-locked.  (I tried this in Emacs 25.1 -> Emacs 29.)  The one
thing I can reproduce is the missing font-locking of the "for" keyword.

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