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

Source/wtf/text/AtomicString.cpp

Index: Source/wtf/text/AtomicString.cpp
diff --git a/Source/wtf/text/AtomicString.cpp b/Source/wtf/text/AtomicString.cpp
index a949c00ed07667172c2b162d3b80bae3294fb40c..22cfbc9da4d14e64624787f125183a39ca9eb68e 100644
--- a/Source/wtf/text/AtomicString.cpp
+++ b/Source/wtf/text/AtomicString.cpp
@@ -243,7 +243,7 @@ PassRefPtr<StringImpl> AtomicString::add(const UChar* s, unsigned length)
 
     if (!length)
         return StringImpl::empty();
-    
+
     UCharBuffer buffer = { s, length };
     return addToStringTable<UCharBuffer, UCharBufferTranslator>(buffer);
 }
@@ -323,7 +323,7 @@ PassRefPtr<StringImpl> AtomicString::add(StringImpl* baseString, unsigned start,
     SubstringLocation buffer = { baseString, start, length };
     return addToStringTable<SubstringLocation, SubstringTranslator>(buffer);
 }
-    
+
 typedef HashTranslatorCharBuffer<LChar> LCharBuffer;
 struct LCharBufferTranslator {
     static unsigned hash(const LCharBuffer& buf)