Re-land "Format all multitests"

tests/language/bad_raw_string_test.dart

 // Copyright (c) 2016, 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.
 
 main() {
   // Raw String may not contain newline (may not be multi-line).
   String x = ''
     r' // //# 01: compile-time error
 ' //      //# 01: continued
     r" // //# 02: compile-time error
 " //      //# 02: continued
-    // Test that a raw string containing just one character, a \n char, fails.
-    // Enclose the test string in a bigger multiline string, except in case 03:
+      // Test that a raw string containing just one character, a \n char, fails.
+      // Enclose the test string in a bigger multiline string, except in case 03:
     ''' // //# 03: compile-time error
-    """
+      """
     ''' // //# 03: continued
     r'
 '
     ''' // //# 03: continued
     """
     ''' // //# 03: continued
-  ;
+      ;
 }