Fixing Module#refine type signature

[piotaixr]

The Module#refine should allow to pass a Module to refine, and not only classes, as the following is legal:

module A
  refine Enumerable do
    def test
      42
    end
  end
end

Also:

• refine accepts a block but does not provide any argument to it
• refine returns an instance of Refinement

a = module A
  refine String do |arg|
    puts arg.class
  end
end
puts a.class
# NilClass
# Refinement
# => nil

[piotaixr]

This to go around the fact that the ruby source seems to require the block given to refine have to be a proper block a not a Proc.

[soutaro]

Thanks.

I would skip the test rather than adding this code, but we can do that when this actually causes a problem. 💪

[soutaro]

🎉