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

Source/core/editing/MoveSelectionCommand.h

Index: Source/core/editing/MoveSelectionCommand.h
diff --git a/Source/core/editing/MoveSelectionCommand.h b/Source/core/editing/MoveSelectionCommand.h
index 7c93ff51ce0092d56eb0d4c1d646ce478b8f001e..f952d5f011bb3299273ce330016b2fc99cebf204 100644
--- a/Source/core/editing/MoveSelectionCommand.h
+++ b/Source/core/editing/MoveSelectionCommand.h
@@ -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.
  */
 
 #ifndef MoveSelectionCommand_h
@@ -44,7 +44,7 @@ private:
 
     virtual void doApply();
     virtual EditAction editingAction() const;
-    
+
     RefPtr<DocumentFragment> m_fragment;
     Position m_position;
     bool m_smartInsert;