Fixed about_array_assignment.rb to pass all tests

Learned about:
- non-paralel and paralel assignments of array elements to variables.
- splat operator that can be used when the number of variables is unknown.
- swapping variable values with parallel assignment.

[#65851748]
Merge pull request #5 from mkreyman/65851748_about_array_assignment_master

Fixed about_array_assignment.rb to pass all tests

[Delivers #65851748]