Fix trailing whitespace in .cpp, .h, and .idl files

Source/core/editing/ReplaceNodeWithSpanCommand.cpp

Index: Source/core/editing/ReplaceNodeWithSpanCommand.cpp
diff --git a/Source/core/editing/ReplaceNodeWithSpanCommand.cpp b/Source/core/editing/ReplaceNodeWithSpanCommand.cpp
index df7d37adc2f21beeeeaf03b345b35362d93d6039..8141f8077030b1639ffe92b9fe33a52ff82e306e 100644
--- a/Source/core/editing/ReplaceNodeWithSpanCommand.cpp
+++ b/Source/core/editing/ReplaceNodeWithSpanCommand.cpp
@@ -1,10 +1,10 @@
 /*
  * Copyright (c) 2009 Google Inc. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR