tex-mode: too many _ (underscores) interpreted as subscripts

[Christian Schlauer]

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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

The News file of CVS Emacs announces the following for TeX mode:

*** verbatim environments are now highlighted in courier by font-lock
and super/sub-scripts are made into super/sub-scripts.

At the moment, it considers too many underscores as subscript
commands. While it leaves \cite{blah99:_long_title} and
\verb+file_name+ alone, it displays the commands
\nolinkurl{file_name_with_underscore.txt} and
\url{file_name_with_underscore.txt} (both available with the hyperref
package, the last one also with url.sty) wrong, that is, the first
letter after an underscore in these commands is transformed into a
subscript.

In GNU Emacs 21.3.50.1 (i386-mingw-nt5.1.2600)
 of 2004-05-19 on BERATUNG4
configured using `configure --with-gcc (3.3) --cflags 
-I../../jpeg-6b-1/include -I../../libpng-1.2.4-1/include 
-I../../tiff-3.5.7/include -I../../xpm-nox-4.2.0/include 
-I../../zlib-1.1.4-1/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: DEU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: LaTeX

Minor modes in effect:
  tool-bar-mode: t
  encoded-kbd-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t

Recent input:
- e m a c s - f o n t - l o c k . t e x <return> M-x
f o n t - l o c k - m o d e <return> \ n o l i n k
u r l { } <left> f i l e _ n a m e _ w i t h _ u n
d e r s c r o <backspace> <backspace> o r e . t x t
C-e M-x r e p o r t - e m a SPC b u g <return>

Recent messages:
Loading tex-mode...done
Making completion list...
Loading font-lock...done
Loading jit-lock...done
mwheel-scroll: Beginning of buffer [188 times]
Making completion list...
(New file)
Font-Lock mode enabled
Loading skeleton...done
Loading emacsbug...done