doc/Type: correct List definition (#1281)

cuonglm · zoffixznet · commit 60dbcb834f32 · 2017-04-13T07:22:42.000-04:00
diff --git a/doc/Type/List.pod6 b/doc/Type/List.pod6
@@ -5,7 +5,7 @@
 =SUBTITLE Sequence of values
 
 =for code :skip-test
-my class List is Iterable does Positional { }
+my class List does Iterable does Positional { }
 
 C<List> stores items sequentially and potentially lazily.
 
