[ruby-core:23558] AST changes in ruby 1.8.6-p368

I just did `multiruby_setup the_usual` and `rake multi` on ParseTree  
to see if I'm still valid and I got some new failures. The latest  
versions of 1.8.6 and 1.8.7 both have the following failures with my  
inline questions:

> VERSION = 1.8.6-p368
> CMD     = ~/.multiruby/install/1.8.6-p368/bin/ruby -w -I../../ 
> RubyInline/dev/lib:../../sexp_processor/dev/lib:../../ZenTest/dev/ 
> lib:lib:lib:ext:bin:test -e 'require "rubygems"; require "test/ 
> unit"; require "test/test_parse_tree.rb"; require "test/ 
> test_parse_tree_extensions.rb"; require "test/test_unified_ruby.rb"'
>
> nuking /Users/ryan/.ruby_inline
> Loaded suite -e
> Started
> .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................F........................................FF..............................................................................................................................................................
> Finished in 0.868035 seconds.
>
>   1) Failure:
> test_flip2_method(TestRawParseTree) [./test/pt_testcase.rb:131]:
> failed on input: "if 1..2.a?(b) then\n  nil\nend".
> <[:if,
>  [:flip2, [:lit, 1], [:call, [:lit, 2], :a?, [:array, [:vcall, :b]]]],
>  [:nil],
>  nil]> expected but was
> <[:if,
>  [:flip2,
>   [:call, [:lit, 1], :==, [:array, [:gvar, :$.]]],
>   [:call, [:lit, 2], :a?, [:array, [:vcall, :b]]]],
>  [:nil],
>  nil]>.

is the '== $.' part only if range begin is a lit/fixnum?

>   2) Failure:
> test_lit_range2(TestRawParseTree) [./test/pt_testcase.rb:131]:
> failed on input: "(1..10)".
> <[:lit, 1..10]> expected but was
> <[:lit, 1..10, 18837520]>.
>
>   3) Failure:
> test_lit_range3(TestRawParseTree) [./test/pt_testcase.rb:131]:
> failed on input: "(1...10)".
> <[:lit, 1...10]> expected but was
> <[:lit, 1...10, 18814640]>.

What are these new values?

> 704 tests, 3408 assertions, 3 failures, 0 errors