fix typo

Author: coke

doc/Language/operators.pod6

@@ -3001,7 +3001,7 @@ As any other infix operator, it can be used under its full name:
 =for code
 say infix:<Z>(<a b>,<c d>);             # OUTPUT: «((a c) (b d))␤»
 
-If no argument is given, it will return an emtpy C<Seq>
+If no argument is given, it will return an empty C<Seq>
 
 =for code
 say infix:<Z>();                        # OUTPUT: «()␤»