bug#9054: 24.0.50; show source in other window

[martin rudalics]

> Ah, I didn't meant regexes; I meant using display-buffer-alist to tell Emacs 
to
> re-use *Help* buffer instead of creating new ones.

Did you mean to re-use the *Help* buffer _window_ instead of creating a
new one?  I think that should be the rule since the *Help* buffer is
more or less unique but I nowhere see it enforced.

martin