Clarify parallelism of hyper operators

Author: ugexe

doc/Language/operators.pod6

@@ -326,7 +326,7 @@ Hyper operators are defined recursively on nested arrays.
 
 Also, methods can be called in an out of order, concurrent fashion. The
 resulting list will be in order. Note that all hyper operators are candidates
-for autothreading and will cause tears if the methods have side effects. The
+for parallelism and will cause tears if the methods have side effects. The
 optimizer has full reign over hyper operators, which is the reason that they
 cannot be defined by the user.