gh-120128: fix description of argument to ipaddress.collapse_addresses() (#120131)

The argument to collapse_addresses() is now described as an *iterable*
(rather than *iterator*).

Author: zuo

Diff for: Doc/library/ipaddress.rst

@@ -990,7 +990,7 @@ The module also provides the following module level functions:
 .. function:: collapse_addresses(addresses)
 
    Return an iterator of the collapsed :class:`IPv4Network` or
-   :class:`IPv6Network` objects.  *addresses* is an iterator of
+   :class:`IPv6Network` objects.  *addresses* is an :term:`iterable` of
    :class:`IPv4Network` or :class:`IPv6Network` objects.  A :exc:`TypeError` is
    raised if *addresses* contains mixed version objects.
 

Diff for: Lib/ipaddress.py

@@ -310,7 +310,7 @@ def collapse_addresses(addresses):
                            [IPv4Network('192.0.2.0/24')]
 
     Args:
-        addresses: An iterator of IPv4Network or IPv6Network objects.
+        addresses: An iterable of IPv4Network or IPv6Network objects.
 
     Returns:
         An iterator of the collapsed IPv(4|6)Network objects.