Fix closure pretty-print tests

Author: brson

src/test/pretty/disamb-stmt-expr.rs

@@ -4,7 +4,7 @@
 // preserved.  They are needed to disambiguate `{return n+1}; - 0` from
 // `({return n+1}-0)`.
 
-fn id(f: fn() -> int) -> int { f() }
+fn id(f: fn&() -> int) -> int { f() }
 
 fn wsucc(n: int) -> int { (do id || { 1 }) - 0 }
 fn main() { }

src/test/pretty/fn-types.rs

@@ -1,7 +1,6 @@
 // pp-exact
 
 fn from_foreign_fn(x: extern fn()) { }
-fn from_closure(x: fn()) { }
 fn from_stack_closure(x: fn&()) { }
 fn from_box_closure(x: fn@()) { }
 fn from_unique_closure(x: fn~()) { }