Revert "Whistle while I work..."

This reverts commit f94b91529015dd721922ec5799a706475ab61749.

Conflicts:
	koans/about_array_assignment.rb
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]
Gaining karma by practicing about_array_assignment

* parallel assignment

[#54145815]