[Intl] Cleanup some code

pkg/intl/lib/bidi_formatter.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.
 
 part of intl;
 
 /**
  * Bidi stands for Bi-directional text.
  * According to [Wikipedia](http://en.wikipedia.org/wiki/Bi-directional_text):
  * Bi-directional text is text containing text in both text directionalities,
@@ skipping 154 matching lines @@
    * HTML-escaped.
    */
   String _resetDir(String text, TextDirection direction, bool isHtml) {
     // endsWithRtl and endsWithLtr are called only if needed (short-circuit).
     if ((contextDirection == TextDirection.LTR &&
           (direction == TextDirection.RTL ||
            Bidi.endsWithRtl(text, isHtml))) ||
         (contextDirection == TextDirection.RTL &&
           (direction == TextDirection.LTR ||
            Bidi.endsWithLtr(text, isHtml)))) {
-      if (contextDirection == TextDirection.LTR) {
-        return Bidi.LRM;
-      } else {
-        return Bidi.RLM;
-      }
+      return contextDirection == TextDirection.LTR ? Bidi.LRM : Bidi.RLM;
     } else {
       return '';
     }
   }
 }