Constant that refers to classname appears in doc even when #:nodoc:'d

[sgharms]

class Jobo
 A_CONS = 1 # :nodoc:
 J=Jobo # :nodoc:

 def foo
   'foo'
 end
end

in the resulting output J will still appear as a constant in the docs. A_CONS will not. This was found in the wild in ruby/lib/e2mmap.rb.