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?