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

Source/core/editing/TextInsertionBaseCommand.cpp

Index: Source/core/editing/TextInsertionBaseCommand.cpp
diff --git a/Source/core/editing/TextInsertionBaseCommand.cpp b/Source/core/editing/TextInsertionBaseCommand.cpp
index 33fa85545bec418b2af7cf3a3d2588f26890c10e..e9a9b23ae18a40e42f4a7f2009db87b4326f4055 100644
--- a/Source/core/editing/TextInsertionBaseCommand.cpp
+++ b/Source/core/editing/TextInsertionBaseCommand.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"
@@ -75,7 +75,7 @@ bool canAppendNewLineFeedToSelection(const VisibleSelection& selection)
     Node* node = selection.rootEditableElement();
     if (!node)
         return false;
-    
+
     RefPtr<BeforeTextInsertedEvent> event = BeforeTextInsertedEvent::create(String("\n"));
     node->dispatchEvent(event, IGNORE_EXCEPTION);
     return event->text().length();