Dart SDK Spelling b, c, and d.

tools/dom/templates/html/impl/impl_Touch.darttemplate

 // 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 $LIBRARYNAME;
 
 @DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
 
 // As of Chrome 37, these all changed from long to double.  This code
-// preserves backwards compatability for the time being.
+// preserves backwards compatibility for the time being.
 $if DART2JS
   int get __clientX => JS('num', '#.clientX', this).round();
   int get __clientY => JS('num', '#.clientY', this).round();
   int get __screenX => JS('num', '#.screenX', this).round();
   int get __screenY => JS('num', '#.screenY', this).round();
   int get __pageX => JS('num', '#.pageX', this).round();
   int get __pageY => JS('num', '#.pageY', this).round();
   int get __radiusX => JS('num', '#.radiusX', this).round();
   int get __radiusY => JS('num', '#.radiusY', this).round();
 $else
@@ skipping 27 matching lines @@
   int get radiusX => __radiusX;
 
   @DomName('Touch.radiusY')
   @DocsEditable()
   @SupportedBrowser(SupportedBrowser.CHROME)
   @SupportedBrowser(SupportedBrowser.SAFARI)
   @Experimental()
   int get radiusY => __radiusY;
 
 }