Add a link to buffer protocol in bytearray() doc (GH-22675)
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index b33aa81..52a1512 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -164,8 +164,8 @@
* If it is an *integer*, the array will have that size and will be
initialized with null bytes.
- * If it is an object conforming to the *buffer* interface, a read-only buffer
- of the object will be used to initialize the bytes array.
+ * If it is an object conforming to the :ref:`buffer interface <bufferobjects>`,
+ a read-only buffer of the object will be used to initialize the bytes array.
* If it is an *iterable*, it must be an iterable of integers in the range
``0 <= x < 256``, which are used as the initial contents of the array.