Revert "Whistle while I work..."

 * JN changes were backed out, not necessary.  Per JN.

This reverts commit 251090f3afef1af42b06fd93eefe6568484a4d6c.

Conflicts:
	koans/about_array_assignment.rb
Clean up revert about_array_assignment.rb

* all tests now passing.

[#54145631]