Run dartfmt on pkg/front_end/lib.

pkg/front_end/lib/src/fasta/modifier.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.
 
 library fasta.modifier;
 
-import 'errors.dart' show
-    internalError;
+import 'errors.dart' show internalError;
 
 enum ModifierEnum {
   Abstract,
   Const,
   External,
   Final,
   Static,
 
   // Not a real modifier.
   Var,
@@ skipping 48 matching lines @@
   static int validate(List<Modifier> modifiers, {bool isAbstract: false}) {
     // TODO(ahe): Implement modifier validation: ordering and uniqueness.
     int result = isAbstract ? abstractMask : 0;
     if (modifiers == null) return result;
     for (Modifier modifier in modifiers) {
       result |= modifier.mask;
     }
     return result;
   }
 }