Enforce LF line endings in the git database.

tests/compiler/dart2js/semantic_visitor_test_send_data.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.semantics_visitor_test;
 
 const Map<String, List<Test>> SEND_TESTS = const {
   'Parameters': const [
     // Parameters
     const Test('m(o) => o;',
@@ skipping 3498 matching lines @@
         '''
         m(a) => a ??= 42;
         ''',
         const Visit(
             VisitKind.VISIT_PARAMETER_COMPOUND,
             element: 'parameter(m#a)',
             operator: '??=',
             rhs: '42')),
   ],
 };