Fix typos (Merge https://github.com/dart-lang/intl/pull/119/files )

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=130784023
diff --git a/README.md b/README.md
index 127fd50..1a0f074 100644
--- a/README.md
+++ b/README.md
@@ -158,7 +158,7 @@
           howMany,
           zero: 'There are no emails left for $userName.',
           one: 'There is one email left for $userName.',
-          other: 'There are $howMany emails left for $userName.'),
+          other: 'There are $howMany emails left for $userName.',
           name: "remainingEmailsMessage",
           args: [howMany, userName],
           desc: "How many emails remain after archiving.",
@@ -172,7 +172,7 @@
           userGender,
           male: '$userName is unavailable because he is not online.',
           female: '$userName is unavailable because she is not online.',
-          other: '$userName is unavailable because they are not online'),
+          other: '$userName is unavailable because they are not online',
           name: "notOnlineMessage",
           args: [userName, userGender],
           desc: "The user is not available to hangout.",
diff --git a/bin/extract_to_arb.dart b/bin/extract_to_arb.dart
index 9db5ee3..7c643f9 100644
--- a/bin/extract_to_arb.dart
+++ b/bin/extract_to_arb.dart
@@ -17,6 +17,8 @@
 import 'package:intl/extract_messages.dart';
 import 'package:intl/src/intl_message.dart';
 
+var outputFilename = 'intl_messages.arb';
+
 main(List<String> args) {
   var targetDir;
   bool transformer;
@@ -47,7 +49,7 @@
       help: 'Specify the output directory.');
   parser.parse(args);
   if (args.length == 0) {
-    print('Accepts Dart files and produces intl_messages.json');
+    print('Accepts Dart files and produces $outputFilename');
     print('Usage: extract_to_arb [options] [files.dart]');
     print(parser.usage);
     exit(0);
@@ -57,7 +59,7 @@
     var messages = extraction.parseFile(new File(arg), transformer);
     messages.forEach((k, v) => allMessages.addAll(toARB(v)));
   }
-  var file = new File(path.join(targetDir, 'intl_messages.arb'));
+  var file = new File(path.join(targetDir, outputFilename));
   file.writeAsStringSync(JSON.encode(allMessages));
   if (extraction.hasWarnings && extraction.warningsAreErrors) {
     exit(1);