Move spaces from before comments to within comments

tests/language/prefix_identifier_reference_test.dart

Index: tests/language/prefix_identifier_reference_test.dart
diff --git a/tests/language/prefix_identifier_reference_test.dart b/tests/language/prefix_identifier_reference_test.dart
index a45d3bdf28c50426ed19558ce1561f208d2fc0c5..77bae4e72a1523a5f02b92361a9fb14731d81d89 100644
--- a/tests/language/prefix_identifier_reference_test.dart
+++ b/tests/language/prefix_identifier_reference_test.dart
@@ -17,9 +17,9 @@ import "empty_library.dart" as p;
 void f(x) {}
 
 main() {
-  f(p);         /// 01: compile-time error
-  var x = p;    /// 02: compile-time error
+  f(p); //      /// 01: compile-time error
+  var x = p; // /// 02: compile-time error
   var x = p[0]; /// 03: compile-time error
   p[0] = null;  /// 04: compile-time error
-  p += 0;       /// 05: compile-time error
+  p += 0; //    /// 05: compile-time error
 }