Clarifying "lookaround" assertions according ot answers in rakudo/rakudo#3800
Clarifying "lookaround" assertions according ot answers in rakudo/rakudo#3800

Checking item in #2632

MasterDuke17/doc,tbrowder/doc,tbrowder/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,MasterDuke17/doc,tbrowder/doc