Explains squish example and corrects error r#1731

Author: JJ

doc/Type/Any.pod6

@@ -801,7 +801,8 @@ argument or C<===> by default.
 "aABbccdDaa".comb.squish( :as(&lc) ).say; # OUTPUT: «(a B c d a)␤»
 (3+2i,3+3i,4+0i).squish( as => *.re, with => &[==]).put; #OUTPUT: «3+2i 4+0i␤»
 
-As shown in the last example, a sequence can contain a single element.
+As shown in the last example, a sequence can contain a single element. See
+L<C<List.squish>|/type/List#routine_squish> for additional examples.
 
 =head2 method permutations