no need for parens

Author: tbrowder

doc/Language/faq.pod6

@@ -685,7 +685,7 @@ Examples:
 
     class Foo { has $.i is rw };
 
-    for (1..1_000_000) -> $i {
+    for 1..1_000_000 -> $i {
         my $obj = Foo.new;
         $obj.i = $i;
     }