"publishTo" -> "publish_to".

sdk/lib/_internal/pub/test/pubspec_test.dart

 // Copyright (c) 2012, 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 pubspec_test;
 
 import 'dart:async';
 
 import 'package:unittest/unittest.dart';
 
@@ skipping 403 matching lines @@
       });
     });
 
     group("publishTo", () {
       test("defaults to null if omitted", () {
         var pubspec = new Pubspec.parse('', sources);
         expect(pubspec.publishTo, isNull);
       });
 
       test("throws if not a string", () {
-        expectPubspecException('publishTo: 123',
+        expectPubspecException('publish_to: 123',
             (pubspec) => pubspec.publishTo);
       });
 
       test("allows a URL", () {
         var pubspec = new Pubspec.parse('''
-publishTo: http://example.com
+publish_to: http://example.com
 ''', sources);
         expect(pubspec.publishTo, equals("http://example.com"));
       });
 
       test("allows none", () {
         var pubspec = new Pubspec.parse('''
-publishTo: none
+publish_to: none
 ''', sources);
         expect(pubspec.publishTo, equals("none"));
       });
 
       test("throws on other strings", () {
-        expectPubspecException('publishTo: http://bad.url:not-port',
+        expectPubspecException('publish_to: http://bad.url:not-port',
             (pubspec) => pubspec.publishTo);
       });
     });
   });
 }