Am 11.11.2007 um 15:06 schrieb Sven Bretfeld:

> pp\.[ \|$][0-9]
>
> To my understanding, it should mean: the string pp. followed by a
> group consisting of space or end-of-line followed by a number.
>
> ...
>
> What's my mistake?

You mean: what *are* ?

Everything between square brackets, i.e. in [], are alternatives, no  
| is needed.

What you are trying to search and destroy, ahhem, replace are not  
line endings but line feeds inside the from expression. These are put  
into the expression as C-q C-j. The expression between [] won't look  
like such, but I can give you some guarantee: it works! Definitely.


And please read again what a "group" in regular expressions is! The `` 
[ \|$]´´ and the ``[0-9]´´ are bracket expressions, a faulty (for  
your purpose) and a working one. If you want to re-use parts of the  
search expression you can use:

	\(pp\.\)[ ^J]\([0-9]\)  ->  \1~\2

Line feed or SPC are converted to ~.

--
Mit friedvollen Grüßen

   Pete

Well done is better than well said.
                            -- Benjamin Franklin