Update runtime files.
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 6670f45..6b638fa 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt* For Vim version 8.1. Last change: 2017 Oct 03
+*diff.txt* For Vim version 8.1. Last change: 2019 Feb 27
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -179,8 +179,8 @@
need another buffer. This command is useful: >
command DiffOrig vert new | set bt=nofile | r ++edit # | 0d_
\ | diffthis | wincmd p | diffthis
-(this is in |vimrc_example.vim|). Use ":DiffOrig" to see the differences
-between the current buffer and the file it was loaded from.
+(this is in |defaults.vim|). Use ":DiffOrig" to see the differences between
+the current buffer and the file it was loaded from.
A buffer that is unloaded cannot be used for the diff. But it does work for
hidden buffers. You can use ":hide" to close a window without unloading the