Make Abstract

Usage:

require 'make_abstract'

class AbstractClass
  make_abstract
end    

class AbstractChildClass < AbstractClass
  make_abstract
end

class ChildClass < AbstractClass
end

AbstractClass.new         # will generate CantInstantiateError
AbstractChildClass.new    # will generate CantInstantiateError
ChildClass.new            # will create new ChildClass object

Gem

Tried to create a gemspec file but I have never created a gem before and I am distracted so maybe it won't work. Also first time using test-first coding. I like the concept of it, but not sure if I did the test units right. Whatever.