improve free floating methods

Author: gfldex

doc/Type/Method.pod6

@@ -6,11 +6,15 @@
 
     class Method is Routine { }
 
-A type for methods. To create a method, use the C<method> keyword:
+A type for methods. To create a method outside a L<class
+definition|/language/typesystem#Methods>, use the declarators C<my> and C<method>:
 
     my $m = method ($invocant: $param) {
         say "$invocant: '$param'";
     }
     "greeting".$m("hello");         # greeting: 'hello'
 
+    <a b c>.&(my method (List:D:){dd self; self}).say;
+    # OUTPUT«("a", "b", "c")␤(a b c)␤»
+
 =end pod