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

Source/core/html/HTMLOptGroupElement.cpp

Index: Source/core/html/HTMLOptGroupElement.cpp
diff --git a/Source/core/html/HTMLOptGroupElement.cpp b/Source/core/html/HTMLOptGroupElement.cpp
index 492f2b098c0beb9103b24b98588bd9108cb0e804..e88a4fd6a11d9d81eac18c2b6076934302b325df 100644
--- a/Source/core/html/HTMLOptGroupElement.cpp
+++ b/Source/core/html/HTMLOptGroupElement.cpp
@@ -126,24 +126,24 @@ PassRefPtr<RenderStyle> HTMLOptGroupElement::customStyleForRenderer()
 String HTMLOptGroupElement::groupLabelText() const
 {
     String itemText = document()->displayStringModifiedByEncoding(getAttribute(labelAttr));
-    
+
     // In WinIE, leading and trailing whitespace is ignored in options and optgroups. We match this behavior.
     itemText = itemText.stripWhiteSpace();
     // We want to collapse our whitespace too.  This will match other browsers.
     itemText = itemText.simplifyWhiteSpace();
-        
+
     return itemText;
 }
-    
+
 HTMLSelectElement* HTMLOptGroupElement::ownerSelectElement() const
 {
     ContainerNode* select = parentNode();
     while (select && !select->hasTagName(selectTag))
         select = select->parentNode();
-    
+
     if (!select)
        return 0;
-    
+
     return toHTMLSelectElement(select);
 }