syntax: Fix lambda parsing following 'ret'

src/libsyntax/parse/token.rs

@@ -198,6 +198,8 @@ pure fn can_begin_expr(t: token) -> bool {
       BINOP(MINUS) { true }
       BINOP(STAR) { true }
       BINOP(AND) { true }
+      BINOP(OR) { true } // in lambda syntax
+      OROR { true } // in lambda syntax
       MOD_SEP { true }
       _ { false }
     }

src/test/run-pass/newlambdas.rs

@@ -4,6 +4,10 @@ fn f(i: int, f: fn(int) -> int) -> int { f(i) }
 
 fn g(g: fn()) { }
 
+fn ff() -> fn@(int) -> int {
+    ret |x| x + 1;
+}
+
 fn main() {
     assert f(10, |a| a) == 10;
     g(||());
@@ -11,4 +15,5 @@ fn main() {
     do g() || { }
     let _x: fn@() -> int = || 10;
     let _y: fn@(int) -> int = |a| a;
+    assert ff()(10) == 11;
 }