Handle "is parcel" better in Parameter.perl and Parameter.sigil
Handle "is parcel" better in Parameter.perl and Parameter.sigil

This modifies:

  Parameter.sigil to only be '\' when it would otherwise be '$' but
  the parameter 'is parcel'

  Parameter.perl to emit 'is parcel' in the cases where unspace
  would mess up a re-parse, not to emit '\%' or '\&' anymore
  and use 'is parcel' instead for those, and to correctly add an
  'is parcel' to '|c is parcel'.  I don't know if the last one makes
  any sense, but if it doesn't it probably should not parse in the
  first place.

niner/rakudo,tony-o/rakudo,sergot/rakudo,Gnouc/rakudo,paultcochrane/rakudo,jonathanstowe/rakudo,Leont/rakudo,tbrowder/rakudo,dankogai/rakudo,LLFourn/rakudo,sjn/rakudo,ungrim97/rakudo,usev6/rakudo,zhuomingliang/rakudo,ugexe/rakudo,MasterDuke17/rakudo,rakudo/rakudo,ugexe/rakudo,ab5tract/rakudo,b2gills/rakudo,skids/rakudo,ungrim97/rakudo,usev6/rakudo,ungrim97/rakudo,rakudo/rakudo,zhuomingliang/rakudo,Leont/rakudo,usev6/rakudo,cognominal/rakudo,jonathanstowe/rakudo,tony-o/rakudo,laben/rakudo,LLFourn/rakudo,tbrowder/rakudo,labster/rakudo,cygx/rakudo,zostay/rakudo,azawawi/rakudo,lucasbuchala/rakudo,b2gills/rakudo,lucasbuchala/rakudo,zostay/rakudo,ab5tract/rakudo,lucasbuchala/rakudo,tony-o/rakudo,cognominal/rakudo,sergot/rakudo,lucasbuchala/rakudo,sjn/rakudo,dankogai/rakudo,ungrim97/rakudo,paultcochrane/rakudo,raydiak/rakudo,nbrown/rakudo,samcv/rakudo,Gnouc/rakudo,dankogai/rakudo,paultcochrane/rakudo,salortiz/rakudo,MasterDuke17/rakudo,ab5tract/rakudo,salortiz/rakudo,salortiz/rakudo,cygx/rakudo,rakudo/rakudo,azawawi/rakudo,softmoth/rakudo,salortiz/rakudo,raydiak/rakudo,Leont/rakudo,cognominal/rakudo,awwaiid/rakudo,MasterDuke17/rakudo,labster/rakudo,tbrowder/rakudo,LLFourn/rakudo,b2gills/rakudo,samcv/rakudo,tbrowder/rakudo,zhuomingliang/rakudo,samcv/rakudo,Leont/rakudo,cognominal/rakudo,lucasbuchala/rakudo,ungrim97/rakudo,ab5tract/rakudo,azawawi/rakudo,Gnouc/rakudo,softmoth/rakudo,skids/rakudo,tony-o/rakudo,ugexe/rakudo,Gnouc/rakudo,sergot/rakudo,samcv/rakudo,paultcochrane/rakudo,labster/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,azawawi/rakudo,niner/rakudo,zostay/rakudo,LLFourn/rakudo,MasterDuke17/rakudo,ugexe/rakudo,salortiz/rakudo,niner/rakudo,labster/rakudo,cygx/rakudo,LLFourn/rakudo,skids/rakudo,labster/rakudo,cognominal/rakudo,nunorc/rakudo,sjn/rakudo,zostay/rakudo,nbrown/rakudo,nbrown/rakudo,softmoth/rakudo,salortiz/rakudo,b2gills/rakudo,niner/rakudo,sjn/rakudo,nbrown/rakudo,tbrowder/rakudo,tbrowder/rakudo,skids/rakudo,raydiak/rakudo,usev6/rakudo,laben/rakudo,ab5tract/rakudo,softmoth/rakudo,Gnouc/rakudo,raydiak/rakudo,laben/rakudo,rakudo/rakudo,tony-o/rakudo,sjn/rakudo,rakudo/rakudo,azawawi/rakudo,softmoth/rakudo,awwaiid/rakudo,cygx/rakudo,tony-o/rakudo,cygx/rakudo,usev6/rakudo,paultcochrane/rakudo,nunorc/rakudo,zhuomingliang/rakudo,dankogai/rakudo,nbrown/rakudo,MasterDuke17/rakudo,awwaiid/rakudo,labster/rakudo,dankogai/rakudo,nunorc/rakudo,nbrown/rakudo,ugexe/rakudo,laben/rakudo,sergot/rakudo,jonathanstowe/rakudo,jonathanstowe/rakudo,rakudo/rakudo,skids/rakudo,awwaiid/rakudo,awwaiid/rakudo,nunorc/rakudo,samcv/rakudo,jonathanstowe/rakudo,b2gills/rakudo