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[racket] require/typed predicates

From: David Van Horn (dvanhorn at ccs.neu.edu)
Date: Wed May 4 21:14:48 EDT 2011		 
I used to be able to write things like this in TR:

#lang typed/racket
(require/typed lang/htdp-advanced
   [char? (Any -> Boolean : Char)])

But now I get:

Type Checker: Type (Any -> Boolean : Char) could not be converted to a 
contract. in: (Any -> Boolean : Char)

Is there a way to recover what I was doing?

Thanks,
David
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