rdoc has issues with multi-line constant defs

I'm investigating why I can't get any useful rdoc output for the HTTPClient 
library. (http://dev.ctor.org/http-access2)

I've created a test case that illustrates the problem I've found.  It appears 
that the rdoc program ignores documented methods when there is multiple-line 
constant definitions in the source-file.

With the attached test case, if I run rdoc on it as-is, I get no HTML 
documentation for the initialize() and get_content() functions.  However, if I 
remove the SSLEnabled and SSPIEnabled definitions, then rdoc will generate 
HTML documentation for initialize() and get_content().

Can anyone confirm this behavior?
Is this a bug in rdoc?  Or is there something wrong with the HTTPClient code?

class HTTPClient

  SSLEnabled = begin
      require 'openssl'
      true
    rescue LoadError
      false
    end

  SSPIEnabled = begin
      require 'win32/sspi'
      true
    rescue LoadError
      false
    end

  # SYNOPSIS
  #   Client.new(proxy = nil, agent_name = nil, from = nil)
  def initialize(proxy = nil, agent_name = nil, from = nil)
    @proxy = nil
  end


  # SYNOPSIS
  #   Client#get_content(uri, query = nil, extheader = {}, &block = nil)
  def get_content(uri, query = nil, extheader = {}, &block)
    'no content'
  end
end