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

Source/core/editing/SplitTextNodeCommand.cpp

Index: Source/core/editing/SplitTextNodeCommand.cpp
diff --git a/Source/core/editing/SplitTextNodeCommand.cpp b/Source/core/editing/SplitTextNodeCommand.cpp
index f4263e1d501880d99b850565b315900eab594bfe..002af627ea87f4a7a50ae726058ed14eb2f9ce53 100644
--- a/Source/core/editing/SplitTextNodeCommand.cpp
+++ b/Source/core/editing/SplitTextNodeCommand.cpp
@@ -20,7 +20,7 @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
@@ -108,5 +108,5 @@ void SplitTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
     addNodeAndDescendants(m_text2.get(), nodes);
 }
 #endif
-    
+
 } // namespace WebCore