small patch for drb/drb.rb.

While trying to understand drb more deeply I created this patch
This was shortly after a cvs update -d.  I'm not sure why the 
timestamp of the original is so new. Maybe I need another option
to cvs or cvs update.  Anyway, hope it helps.

        Hugh


--- lib/drb/drb.rb      2006-06-16 15:22:20.844390000 +0100
+++ lib/drb/drb_new.rb  2006-06-16 15:50:39.285669000 +0100
@@ -430,12 +430,15 @@
     end
   end

+  # An exception wrapping an error object
   class DRbRemoteError < DRbError
     def initialize(error)
       @reason = error.class.to_s
       super("#{error.message} (#{error.class})")
       set_backtrace(error.backtrace)
     end
+
+    # the class of the error, as a string.
     attr_reader :reason
   end