[AUCTeX] Bug: tilde breaks quote insertation

[Plamen Tanovski]

Hi,

I have a text where a quote is preceeded by a tilde, like this

... das Wort~"`ja"' ... 

TeX-insert-quote fails on this and inserts close-quote instead of
open-quote. The reason is because tilde is not included in the regex
for the looking-at function. I can imagine 3 possible solutions, but I
really don't know which ist the best:

1. Include ~ in the regex

2. Make ~ whitespace in the sysntax table and use "\s " in the
regex. 

3. Introduce a new customizable variable TeX-whitespaces, and use it
everywhere.

best regards,

-- 
Plamen Tanovski
Prager Str. 125
04317 Leipzig
Tel. (03 41) 3 08 57 60