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

Source/wtf/StringExtras.h

Index: Source/wtf/StringExtras.h
diff --git a/Source/wtf/StringExtras.h b/Source/wtf/StringExtras.h
index 766080bd6903e73c8932860f48bb969cf3f4a384..4166f0f146564af1c2d0b9b13b27d8b0c39d1020 100644
--- a/Source/wtf/StringExtras.h
+++ b/Source/wtf/StringExtras.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 WTF_StringExtras_h
@@ -30,14 +30,14 @@
 #include <stdio.h>
 #include <string.h>
 
-#if HAVE(STRINGS_H) 
-#include <strings.h> 
-#endif 
+#if HAVE(STRINGS_H)
+#include <strings.h>
+#endif
 
 #if COMPILER(MSVC)
 // FIXME: why a COMPILER check instead of OS? also, these should be HAVE checks
 
-inline int snprintf(char* buffer, size_t count, const char* format, ...) 
+inline int snprintf(char* buffer, size_t count, const char* format, ...)
 {
     int result;
     va_list args;
@@ -65,7 +65,7 @@ inline double wtf_vsnprintf(char* buffer, size_t count, const char* format, va_l
     return result;
 }
 
-// Work around a difference in Microsoft's implementation of vsnprintf, where 
+// Work around a difference in Microsoft's implementation of vsnprintf, where
 // vsnprintf does not null terminate the buffer. WebKit can rely on the null termination.
 #define vsnprintf(buffer, count, format, args) wtf_vsnprintf(buffer, count, format, args)