according to S02, under 'Literals', generalized quotes may now take adverbs. in that section is the following comment:
<snip> [Conjectural: Ordinarily the colon is required on adverbs, but the "quote" declarator allows you to combine any of the existing adverbial forms above without an intervening colon: quote qw; # declare a P5-esque qw// <snip> there's trouble if both q (:single) and qq (:double) are allowed together. how would qqq resolve? i say it makes sense that we get longest-token matching first, which means it translates to :double followed by :single. ~jerry