Fix BufferedIOBase.write() link in buffer.rst

Author: vstinner

Doc/c-api/buffer.rst

@@ -42,9 +42,9 @@ Simple objects such as :class:`bytes` and :class:`bytearray` expose their
 underlying buffer in byte-oriented form.  Other forms are possible; for example,
 the elements exposed by an :class:`array.array` can be multi-byte values.
 
-An example consumer of the buffer interface is the :meth:`!write`
+An example consumer of the buffer interface is the :meth:`~io.BufferedIOBase.write`
 method of file objects: any object that can export a series of bytes through
-the buffer interface can be written to a file.  While :meth:`!write` only
+the buffer interface can be written to a file.  While :meth:`~io.BufferedIOBase.write` only
 needs read-only access to the internal contents of the object passed to it,
 other methods such as :meth:`~io.BufferedIOBase.readinto` need write access
 to the contents of their argument.  The buffer interface allows objects to