Update runtime files.
diff --git a/runtime/doc/editing.txt b/runtime/doc/editing.txt
index 5a303c0..caf37c8 100644
--- a/runtime/doc/editing.txt
+++ b/runtime/doc/editing.txt
@@ -1,4 +1,4 @@
-*editing.txt* For Vim version 8.1. Last change: 2019 May 07
+*editing.txt* For Vim version 8.1. Last change: 2019 Jun 02
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -593,7 +593,7 @@
expression functions |argc()| and |argv()|. These all work on the argument
list of the current window.
- *:ar* *:args*
+ *:ar* *:arg* *:args*
:ar[gs] Print the argument list, with the current file in
square brackets.