bug#23793: 25.0.95; CEDET should use xref marker stack when jumping

Bastian Beischer <[email protected]> writes:

> CEDET / Semantic should use xref-push-marker-stack when jumping to a
> tag, this makes it easy to pop back to the original place.
>
> Patch for Emacs 25.0.95 is attached - but maybe there are more places
> that need fixing? There's also the option to put this in
> semantic-go-to-tag directly.

Thanks; I've applied it to the Emacs trunk.  It was just small enough to
apply without a copyright assignment, if I counted the lines correctly,
but for further changes, we'd need some copyright assignment paperwork.

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