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

Source/wtf/FilePrintStream.cpp

Index: Source/wtf/FilePrintStream.cpp
diff --git a/Source/wtf/FilePrintStream.cpp b/Source/wtf/FilePrintStream.cpp
index b5ab25e0bfe97d4efede48d4e3c90f6ca0a34eae..b2b29679217db5cc5e87eca75f63f5c19a0036fa 100644
--- a/Source/wtf/FilePrintStream.cpp
+++ b/Source/wtf/FilePrintStream.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"
@@ -46,7 +46,7 @@ PassOwnPtr<FilePrintStream> FilePrintStream::open(const char* filename, const ch
     FILE* file = fopen(filename, mode);
     if (!file)
         return PassOwnPtr<FilePrintStream>();
-    
+
     return adoptPtr(new FilePrintStream(file));
 }