This shameful limitation of the fileinput module is not relevant anymore.
diff --git a/Doc/library/fileinput.rst b/Doc/library/fileinput.rst
index daefd99..f8ec436 100644
--- a/Doc/library/fileinput.rst
+++ b/Doc/library/fileinput.rst
@@ -171,10 +171,6 @@
it is deleted when the output file is closed. In-place filtering is disabled
when standard input is read.
-.. note::
-
- The current implementation does not work for MS-DOS 8+3 filesystems.
-
The two following opening hooks are provided by this module: