Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/wtf/DataLog.cpp

Index: Source/wtf/DataLog.cpp
diff --git a/Source/wtf/DataLog.cpp b/Source/wtf/DataLog.cpp
index e36204e2d108080ac59761756fa48774748a43ad..cba35675232c9bbba96849773330832c9fed2b5d 100644
--- a/Source/wtf/DataLog.cpp
+++ b/Source/wtf/DataLog.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"
@@ -70,7 +70,7 @@ static void initializeLogFileOnce()
 #endif // DATA_LOG_TO_FILE
     if (!file)
         file = new FilePrintStream(stderr, FilePrintStream::Borrow);
-    
+
     setvbuf(file->file(), 0, _IONBF, 0); // Prefer unbuffered output, so that we get a full log upon crash or deadlock.
 }