Issue #13757: Change os.fdlistdir() so that it duplicates the passed file
descriptor (instead of closing it).
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 53f5025..0c0d681 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -772,7 +772,7 @@
 .. function:: fdlistdir(fd)
 
    Like :func:`listdir`, but uses a file descriptor instead and always returns
-   strings.  After execution of this function, *fd* will be closed.
+   strings.
 
    Availability: Unix.