Mention int.to_bytes

pep-0467.txt

@@ -114,6 +114,14 @@ in conjunction with indexing operations on binary sequence types).
 As a separate method, the new spelling will also work better with higher
 order functions like ``map``.
 
+These new methods intentionally do NOT offer the same level of general integer
+support as the existing ``int.to_bytes`` conversion method, which allows
+arbitrarily large integers to be converted to arbitarily long bytes objects. The
+restriction to only accept positive integers that fit in a single byte means
+that no byte order information is needed, and there is no need to handle
+negative numbers. The documentation of the new methods will refer readers to
+``int.to_bytes`` for use cases where handling of arbitrary integers is needed.
+
 
 Addition of "getbyte" method to retrieve a single byte
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