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

Source/core/editing/FormatBlockCommand.cpp

Index: Source/core/editing/FormatBlockCommand.cpp
diff --git a/Source/core/editing/FormatBlockCommand.cpp b/Source/core/editing/FormatBlockCommand.cpp
index ff6b7a5fe7583429fa5832d09f47189f76563ac6..ecc7e9845f6397e24014940996c39367b91fc675 100644
--- a/Source/core/editing/FormatBlockCommand.cpp
+++ b/Source/core/editing/FormatBlockCommand.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"
@@ -44,7 +44,7 @@ static inline bool isElementForFormatBlock(Node* node)
     return node->isElementNode() && isElementForFormatBlock(toElement(node)->tagQName());
 }
 
-FormatBlockCommand::FormatBlockCommand(Document* document, const QualifiedName& tagName) 
+FormatBlockCommand::FormatBlockCommand(Document* document, const QualifiedName& tagName)
     : ApplyBlockElementCommand(document, tagName)
     , m_didApply(false)
 {
@@ -94,7 +94,7 @@ void FormatBlockCommand::formatRange(const Position& start, const Position& end,
     if (wasEndOfParagraph && !isEndOfParagraph(lastParagraphInBlockNode) && !isStartOfParagraph(lastParagraphInBlockNode))
         insertBlockPlaceholder(lastParagraphInBlockNode);
 }
-    
+
 Element* FormatBlockCommand::elementForFormatBlockCommand(Range* range)
 {
     if (!range)