dkubb/adamantium — pull request #10 by mbj (2013-01-09 15:16:52+00:00)
Title: Do not allow memoization methods with nonzero arity

This makes sure the memoizer is not used to create tricky to track down
bugs.

Currently adamantium allows the following:

```
class Foo
include Adamantium

def something(x)
x * 2
end
memoize :something
end

foo = Foo.new
foo.something(1) # => 2
foo.something(2) # => 2, Tricky to track down bug.
```