Clarify that Queue.join is unblocked unconditionally

Author: rhettinger

Doc/library/queue.rst

@@ -259,8 +259,9 @@ or terminated immediately.
    If *immediate* is true, the queue is terminated immediately.
    The queue is drained to be completely empty.  The count of
    unfinished tasks is reduced by number drained but without calling
-   :meth:`~Queue.task_done`.  That then unblocks all callers of
-   :meth:`~Queue.join`.  In addition, blocked callers of
+   :meth:`~Queue.task_done`.  All callers of :meth:`~Queue.join`
+   are unblocked even if the unfinished tasks is more than zero.
+   In addition, blocked callers of
    :meth:`~Queue.get` are unblocked and will raise :exc:`ShutDown`.
 
    Use caution when using :meth:`~Queue.join` with *immediate* set