[ESS] Prevent ESS From Writing .Rhistory

[Stephen Eglen]

> Thanks for the suggestion. I _never_ would have guessed that the choice 
> of password prompt mattered (especially since I need to read and use two 
> different passwords and was planning to customize the prompts to make 
> sure I knew which was which).
>
> But I'd already found an even better solution (since I also wanted to 
> avoid echoing the password to the screen when I typed it). There is a 
> relatively new R package called "getPass" that will popup a tcltk window 
> to get the password while only showing asterisks.  As a side effect, it 
> also prevents the password from getting written to the .Rhistory file.

Great - but note, that when comint catches the password prompt (as in
version 2) it is not visible -- as you type it, dots appear.b

Stephen