Update rasta direct expectations.

pkg/front_end/test/fasta/rasta/issue_000069.dart.direct.expect

 library;
 import self as self;
 
 static method main() → dynamic {
   dynamic x;
   dynamic i = 0;
-  while ((let final dynamic #t1 = i in let final dynamic #t2 = i = #t1.+(1) in #t1).<(5)) {
+  while ((let final dynamic #t1 = i in let final dynamic #t2 = i = #t1.+(1) in #t1).<(5))
     dynamic x = i;
-  }
 }