Adds join refs #1494

Author: JJ

doc/Type/Any.pod6

@@ -151,9 +151,9 @@ Defined as:
     multi method sort()
     multi method sort(&custom-routine-to-use)
 
-Sorts iterables with L<cmp|/routine/cmp> or given code object and returns a new L<Seq|/type/Seq>.
-Optionally, takes a L<Callable|/type/Callable> as a positional parameter, specifying how to
-sort.
+Sorts iterables with L<cmp|/routine/cmp> or given code object and returns a new
+L<Seq|/type/Seq>. Optionally, takes a L<Callable|/type/Callable> as a positional
+parameter, specifying how to sort.
 
 Examples:
 
@@ -821,6 +821,19 @@ L«C<List.permutations>|/type/List#routine_permutations» on it.
     say set(1,2).permutations;
     # OUTPUT: «((2 => True 1 => True) (1 => True 2 => True))␤»
 
+=head2 method join
+
+Defined as
+
+    method join($separator = '') is nodal
+
+Converts the object to a list, and applies
+L<C<list.join>|/type/List#routine_join> to it. Can take a separator, which is an
+empty string by default.
+
+    (1..3).join.say ;      # OUTPUT: «123␤»
+    <a b c>.join("❧").put; # OUTPUT: «a❧b❧c␤»
+
 =head2 method categorize
 
 Defined as: