Made changes to about_nil.rb to make it work

* Learned nil is a full object

* Not sure about how exceptions work, but made the koan work.

* Learned that there is a test to object ".nil?" that will return true only if object is nill

* Learned nil.to_s returns the empty string, which makes sense

* Learned nil.inspect returns "nil", but I am not sure what inspect is supposed to do yet.

[#65851496]
Update about_objects.rb
Update about_objects.rb
initial commit
Fixed the about_objects.rb file

Learned:

* Everything is an object
* Objects can be converted to strings
* Objects can be inspected
    This one mad me wonder if THIS is the output in IRB and not .to_s
* Every object has an ID
* Every object has a different ID
* Some system objects always have the same ID, like certain constants and small integers
* When an object is cloned, it is given a new object ID

[#65851500]