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

Source/core/html/HTMLOptionElement.cpp

Index: Source/core/html/HTMLOptionElement.cpp
diff --git a/Source/core/html/HTMLOptionElement.cpp b/Source/core/html/HTMLOptionElement.cpp
index e44a404e358ef979b1aa4529fb4639728cf28fc6..6884d9aeb779bc02063eda83e3fa03bae3df75b4 100644
--- a/Source/core/html/HTMLOptionElement.cpp
+++ b/Source/core/html/HTMLOptionElement.cpp
@@ -147,7 +147,7 @@ void HTMLOptionElement::setText(const String &text, ExceptionCode& ec)
         removeChildren();
         appendChild(Text::create(document(), text), ec, AttachLazily);
     }
-    
+
     if (selectIsMenuList && select->selectedIndex() != oldSelectedIndex)
         select->setSelectedIndex(oldSelectedIndex);
 }
@@ -289,7 +289,7 @@ String HTMLOptionElement::label() const
 {
     const AtomicString& label = fastGetAttribute(labelAttr);
     if (!label.isNull())
-        return label; 
+        return label;
     return collectOptionInnerText().stripWhiteSpace(isHTMLSpace).simplifyWhiteSpace(isHTMLSpace);
 }