Fix last change.

diff --git a/doc/emacs/files.texi b/doc/emacs/files.texi
index 17ed5d6d143a92b21f388ad3db97dd020597048a..e5f4d4cc96471ce537f2f3b8b1303ce2026138a5 100644 (file)
--- a/doc/emacs/files.texi
+++ b/doc/emacs/files.texi
@@ -2783,8 +2783,8 @@ functions that are deleted by the patch.
 
 @item M-x diff-show-trailing-whitespaces RET
 @findex diff-show-trailing-whitespaces
-Highlight syntactically problematic trailing whitespace characters
-(usually errors introduced when editing a patch).
+Highlight trailing whitespace characters, except for those used by the
+patch syntax (@pxref{Useless Whitespace}).
 @end table