Update all tests

tests/language/assignable_expression_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Test to detect syntactically illegal left-hand-side (assignable)
 // expressions.
 
 class C {
   static var static_field = 0;
 }
 
 var tl_static_var = 0;
 
 main() {
   tl_static_var = 0;
-  (tl_static_var) = 0;    /// 01: compile-time error
-  (tl_static_var)++;      /// 02: compile-time error
-  ++(tl_static_var);      /// 03: compile-time error
+  (tl_static_var) = 0;    //# 01: compile-time error
+  (tl_static_var)++;      //# 02: compile-time error
+  ++(tl_static_var);      //# 03: compile-time error
 
   C.static_field = 0;
-  (C.static_field) = 0;   /// 11: compile-time error
-  (C.static_field)++;     /// 12: compile-time error
-  ++(C.static_field);     /// 13: compile-time error
+  (C.static_field) = 0;   //# 11: compile-time error
+  (C.static_field)++;     //# 12: compile-time error
+  ++(C.static_field);     //# 13: compile-time error
 
   tl_static_var = [1, 2, 3];
   tl_static_var[0] = 0;
   (tl_static_var)[0] = 0;
-  (tl_static_var[0]) = 0;    /// 21: compile-time error
-  (tl_static_var[0])++;      /// 22: compile-time error
-  ++(tl_static_var[0]);      /// 23: compile-time error
+  (tl_static_var[0]) = 0;    //# 21: compile-time error
+  (tl_static_var[0])++;      //# 22: compile-time error
+  ++(tl_static_var[0]);      //# 23: compile-time error
 
   C.static_field = [1, 2, 3];
-  (C.static_field[0]) = 0;   /// 31: compile-time error
-  (C.static_field[0])++;     /// 32: compile-time error
-  ++(C.static_field[0]);     /// 33: compile-time error
+  (C.static_field[0]) = 0;   //# 31: compile-time error
+  (C.static_field[0])++;     //# 32: compile-time error
+  ++(C.static_field[0]);     //# 33: compile-time error
 
   var a = 0;
-  (a) = 0;   /// 41: compile-time error
-  (a)++;     /// 42: compile-time error
-  ++(a);     /// 43: compile-time error
+  (a) = 0;   //# 41: compile-time error
+  (a)++;     //# 42: compile-time error
+  ++(a);     //# 43: compile-time error
 
   // Neat palindrome expression. x is assignable, ((x)) is not.
-  var funcnuf = (x) => ((x))=((x)) <= (x);  /// 50: compile-time error
+  var funcnuf = (x) => ((x))=((x)) <= (x);  //# 50: compile-time error
 }