Demote warnings to notices where appropriate, following the goal that as few "red box" warnings
should clutter the docs as possible. Part 1: stuff that gets merged to Py3k.
diff --git a/Doc/library/fileinput.rst b/Doc/library/fileinput.rst
index 269d856..3253a07 100644
--- a/Doc/library/fileinput.rst
+++ b/Doc/library/fileinput.rst
@@ -150,7 +150,7 @@
it is deleted when the output file is closed. In-place filtering is disabled
when standard input is read.
-.. warning::
+.. note::
The current implementation does not work for MS-DOS 8+3 filesystems.