Move spaces from before comments to within comments

tests/language/covariant_test.dart

 // Copyright (c) 2017, 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 that `covariant` can be parsed (and ignored) by
 // dart2js and the VM.
 // This test only checks for non-strong mode behavior.
 //
 // Generally, `covariant` should be ignored, when it is used in the right
 // places.
@@ skipping 240 matching lines @@
 
 }
 
 // All of the above as instance members in a class.
 class B {
   covariant  /// 40: ok
   int x40;
 
   covariant int covariant;  /// 40b: ok
 
-  int covariant;            /// 40c: ok
+  int covariant; //         /// 40c: ok
 
   // Getters may never have `covariant`.
   covariant  /// 41: compile-time error
   int get x41 => 499;
 
   void set x42(
       covariant  /// 42: ok
       int val) {}
 
   // `covariant` in the wrong position.
@@ skipping 143 matching lines @@
   use(b.f51());
   use(b.f52(2));
   use(b.f53(2));
   use(b.f54(3));
   use(b.f55(3));
   use(b.f56(3));
   use(b.f57(3));
   Expect.equals(12345, b.f58(12345));
   use(B.covariant);  /// 59: continued
 }