Issue #13724: improve documentation for socket.create_connection.
diff --git a/Doc/library/socket.rst b/Doc/library/socket.rst
index 3fce587..6ace220 100644
--- a/Doc/library/socket.rst
+++ b/Doc/library/socket.rst
@@ -207,10 +207,17 @@
.. function:: create_connection(address[, timeout[, source_address]])
- Convenience function. Connect to *address* (a 2-tuple ``(host, port)``),
- and return the socket object. Passing the optional *timeout* parameter will
- set the timeout on the socket instance before attempting to connect. If no
- *timeout* is supplied, the global default timeout setting returned by
+ Connect to a TCP service listening on the Internet *address* (a 2-tuple
+ ``(host, port)``), and return the socket object. This is a higher-level
+ function than :meth:`socket.connect`: if *host* is a non-numeric hostname,
+ it will try to resolve it for both :data:`AF_INET` and :data:`AF_INET6`,
+ and then try to connect to all possible addresses in turn until a
+ connection succeeds. This makes it easy to write clients that are
+ compatible to both IPv4 and IPv6.
+
+ Passing the optional *timeout* parameter will set the timeout on the
+ socket instance before attempting to connect. If no *timeout* is
+ supplied, the global default timeout setting returned by
:func:`getdefaulttimeout` is used.
If supplied, *source_address* must be a 2-tuple ``(host, port)`` for the