Emacs folding mode problem with Sweave

[Riccardo Romoli]

Hi, 
I would notice a problem with folding mode in Sweave session. The problem is 
about folding/unfolding the R chunks. Moreover a lot of problem are generated 
by the $ character. It has very different function in R and in LaTeX. Infact 
AUCTeX recognize the $ as the biginning point of the math mode so the code 
could not be processed by R. In particular this last problem do not let me 
compile the Sweave file.

Regards
Riccardo