COMMIT Add specs for Marshal respond_to? behaviors.	http://github.com/rubyspec/rubyspec/commit/f979fb9b13372811dfc5fb4519f1886363de0a6c

===================================================================
+++ 20101207T193931Z
@@ 29824 @@
 - raises an Error when the IO-Object does not respond to #write
 - raises an ArgumentError when given more than three arguments
 - raises an Error when trying to dump an anonymous class/module
+- invokes respond_to? for marshal_dump and _dump on user classes
+- attempts to invoke marshal_dump if respond_to? :marshal_dump is true
+- attempts to invoke _dump if respond_to? :_dump is true
 - raises a TypeError if _dump returns a non-string
 - dumps an Object
 - dumps an extended_object
@@ 29907 @@
 - loads a extended_struct having fields with same objects
 - loads a string having ivar with ref to self
 - loads an extended_user_hash with a parameter to initialize
+- invokes respond_to? for marshal_load when the stream needs marshal_load
+- invokes respond_to? for _load when the stream needs _load
 - loads a user-marshaled extended object
 - loads a user_object
 - loads a object
@@ 47685 @@
 
 Finished in <t> seconds
 
+3286 files, 15446 examples, <num> expectations, 7 failures, 1 error
 exit 1
 failed(rubyspec)
 == end # <time>

===================================================================
--- 20101206T194000Z
@@ 47680 @@
 
 Finished in <t> seconds
 
-3286 files, 15441 examples, <num> expectations, 7 failures, 1 error
 exit 1
 failed(rubyspec)
 == end # <time>