[PATCH] test: use dtach(1) instead of screen(1) in emacs tests

[David Bremner]

On Fri, 11 Nov 2011 23:33:58 +0200, Tomi Ollila <tomi.ollila at iki.fi> wrote:
> dtach is simpler than screen and is not setuid/setgid program so
> TMPDIR does not get cleared by dynamic loader when executed

Pushed.