[nsns]

>Improvements to handling of symbols for indexing. ...we’ve now started to index the following heavily used symbols: “%”, “$”, “\”, “.”, “@”, “#”, and “+”. We’ll continue to index more symbols as usage warrants.

That, and the new "Verbatim' option, are really good news. There are also some five (10% of the entire list) timely tweaks to synonyms.

All in all, it seems Google listens and tries to improve its service, which has become rather paternalistic lately ("you wrote X, but actually mean Y", no I don't!). Well done.

[obtu]

I found relevant results for $_, $argv, @memoize, useful completion but no results for $@ and $#, nothing at all for $!. Python programmers rejoice, Perl programmers still mourn code search.