bug#22238: 25.0.50; isearch symbol search can't find ,@symbol

[Dmitry Gutov]

On 12/25/2015 11:29 PM, Michael Heerdegen wrote:

> Regexp searching for "\_<" stops at the "@" char (not at the "s").  At
> least, `isearch-forward-symbol' seems to behave as documented, dunno
> about the "\_<" regexp.

I'm assuming this is about emacs-lisp-mode.

As you can see, this is not about isearch: re-search-forward behaves the 
same in this regard.

This seems to be a regression from the fix for 
http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17325.

Maybe that should just be reverted. A more proper fix would make Emacs 
not consider @ as a symbol constituent when it's the first character. 
The "p" in "_ p" apparently tries but fails to do that.