Remove trailing whitespace.
diff --git a/Doc/library/fileinput.rst b/Doc/library/fileinput.rst
index b3f7e61..269d856 100644
--- a/Doc/library/fileinput.rst
+++ b/Doc/library/fileinput.rst
@@ -151,7 +151,7 @@
 when standard input is read.
 
 .. warning::
-   
+
    The current implementation does not work for MS-DOS 8+3 filesystems.