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-rw-r--r--Doc/library/concurrent.futures.rst3
1 files changed, 2 insertions, 1 deletions
diff --git a/Doc/library/concurrent.futures.rst b/Doc/library/concurrent.futures.rst
index c2f92b3..575b1ea 100644
--- a/Doc/library/concurrent.futures.rst
+++ b/Doc/library/concurrent.futures.rst
@@ -368,7 +368,8 @@ Module Functions
Returns an iterator over the :class:`Future` instances (possibly created by
different :class:`Executor` instances) given by *fs* that yields futures as
- they complete (finished or were cancelled). Any futures that completed
+ they complete (finished or were cancelled). Any futures given by *fs* that
+ are duplicated will be returned once. Any futures that completed
before :func:`as_completed` is called will be yielded first. The returned
iterator raises a :exc:`TimeoutError` if :meth:`~iterator.__next__` is
called and the result isn't available after *timeout* seconds from the