Incorrect handling of exponent text in tex-mode

[Romain Francoise]

Emacs 22 has a new feature to display exponent text with an exponent
font in TeX-mode, but it doesn't work right: in the following line,
"{-9}$ blah.}" is displayed in exponent instead of just "{-9}".

\foo{blah $10^{-9}$ blah.}

There is no such bug in Emacs 21 since the text is shown using a regular
font.

In GNU Emacs 22.0.50.21 (i686-pc-linux-gnu, GTK+ Version 2.8.18)
 of 2006-06-17 on pacem
X server distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure '--with-gtk' 'CFLAGS=-O0 -g -Wno-pointer-sign''

(This was reported as http://bugs.debian.org/365026)

Thanks,
-- 
Romain Francoise <address@hidden> | The sea! the sea! the open
it's a miracle -- http://orebokech.com/ | sea! The blue, the fresh, the
                                        | ever free! --Bryan W. Procter