Update highlighting for prelude changes.

Author: chris-morgan

src/etc/vim/syntax/rust.vim

@@ -3,7 +3,7 @@
 " Maintainer:   Patrick Walton <[email protected]>
 " Maintainer:   Ben Blum <[email protected]>
 " Maintainer:   Chris Morgan <[email protected]>
-" Last Change:  2013 Aug 1
+" Last Change:  2013 Sep 4
 
 if version < 600
   syntax clear
@@ -74,7 +74,7 @@ syn keyword rustTrait Hash
 syn keyword rustTrait Times
 syn keyword rustTrait FromIterator Extendable
 syn keyword rustTrait Iterator DoubleEndedIterator RandomAccessIterator ClonableIterator
-syn keyword rustTrait OrdIterator MutableDoubleEndedIterator
+syn keyword rustTrait OrdIterator MutableDoubleEndedIterator ExactSize
 syn keyword rustTrait Num NumCast CheckedAdd CheckedSub CheckedMul
 syn keyword rustTrait Orderable Signed Unsigned Round
 syn keyword rustTrait Algebraic Trigonometric Exponential Hyperbolic