Fix typos and spelling

3rdparty/taglib/toolkit/tfilestream.cpp

@@ -264,7 +264,7 @@ void FileStream::insert(const ByteVector &data, unsigned long start, unsigned lo
   // Now I'll explain the steps in this ugliness:
 
   // First, make sure that we're working with a buffer that is longer than
-  // the *differnce* in the tag sizes.  We want to avoid overwriting parts
+  // the *difference* in the tag sizes.  We want to avoid overwriting parts
   // that aren't yet in memory, so this is necessary.
 
   unsigned long bufferLength = bufferSize();