Fix about_nil gain karma

* learned that nil is an object in Ruby

[#54145613]
Fix about_nil gained karma

* Calling an undefined method on nil raises a
  NoMethodError with message "method not found"

* This is the most common error in Rails

[#54145613]
Fix about_nil gained karma

* nil object has 64 methods.

* Some returned values are representational

[#54145613]
Merge pull request #2 from bayendor/54145613_about_nil_master

Get all tests on about_nil_master to pass

[Delivers #54145613]