update documentation in the pack library, to clarify that the values to/from the packing functions are not the same array, just arrays that contain the same values

lib/pack.js

@@ -14,7 +14,7 @@
 // const selection = ["B", "C"];
 // const base64EncodedSelection = pack(options, selection);
 // const decodedSelection = unpack(options, base64EncodedSelection);
-// decodedSelection == selection // true
+// JSON.stringify(decodedSelection) === JSON.stringify(selection) // true
 (function () {
     "use strict";