Give fakesignature a $/, $_, and $!.
Give fakesignature a $/, $_, and $!.

So that we don't end up with unintended sharing of $/ when doing a
`foo ~~ :($ where /bar/)` on a bunch of different threads at once.
Greatly reduces the cross-thread write log output from htmlify in
parallel mode.

labster/rakudo,labster/rakudo,Gnouc/rakudo,tbrowder/rakudo,usev6/rakudo,tbrowder/rakudo,tony-o/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,tony-o/rakudo,sjn/rakudo,nbrown/rakudo,sjn/rakudo,MasterDuke17/rakudo,rakudo/rakudo,lucasbuchala/rakudo,nbrown/rakudo,awwaiid/rakudo,raydiak/rakudo,usev6/rakudo,Gnouc/rakudo,usev6/rakudo,salortiz/rakudo,awwaiid/rakudo,usev6/rakudo,raydiak/rakudo,tony-o/rakudo,MasterDuke17/rakudo,lucasbuchala/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,sjn/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,tbrowder/rakudo,raydiak/rakudo,softmoth/rakudo,labster/rakudo,MasterDuke17/rakudo,jonathanstowe/rakudo,nbrown/rakudo,nbrown/rakudo,softmoth/rakudo,tony-o/rakudo,tbrowder/rakudo,nbrown/rakudo,tbrowder/rakudo,salortiz/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,labster/rakudo,MasterDuke17/rakudo,salortiz/rakudo,softmoth/rakudo,raydiak/rakudo,Gnouc/rakudo,awwaiid/rakudo,Gnouc/rakudo,labster/rakudo,rakudo/rakudo,sjn/rakudo,awwaiid/rakudo,Gnouc/rakudo,tony-o/rakudo,jonathanstowe/rakudo,usev6/rakudo,lucasbuchala/rakudo,nbrown/rakudo,softmoth/rakudo,softmoth/rakudo,salortiz/rakudo,rakudo/rakudo,awwaiid/rakudo,rakudo/rakudo,tony-o/rakudo,sjn/rakudo,salortiz/rakudo,MasterDuke17/rakudo