Inexplicable eval behaviour

[Lars Magne Ingebrigtsen]

I just noticed that the Gnus group mode line reads "... *Group*b ...",
and I wondered where the "b" came from.

It's from:

(defun gnus-group-set-mode-line ()
[...]
             (mode-string (eval gformat)))

in gnus-group.el.  At this point, 
             
`mode-string' is set to

"Gnus: %bb {nntp:news.eternal-september.org}";

However, if I just look at what's in `gformat', it's this:

(concat (format "Gnus: %%b {%s%s%s}" gnus-tmp-news-method gnus-tmp-colon 
gnus-tmp-news-server))

If I eval, that, I get the expected:

"Gnus: %b {nntp:news.eternal-september.org}";

So, eval-ing the `gformat' variable gives me a different result than if
I print out the `gformat' variable, and then eval it.

I have no idea what this means, but has anybody done any funky work on
eval lately that can explain this?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/