Update runtime files.
diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index 0431043..bd4fad2 100644
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -1,4 +1,4 @@
-*insert.txt* For Vim version 8.1. Last change: 2019 Jan 11
+*insert.txt* For Vim version 8.1. Last change: 2019 Jan 29
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1078,7 +1078,8 @@
leading text is changed.
If you want to suppress the warning message for an empty result, return
-v:none. This is useful to implement asynchronous completion with complete().
+|v:none|. This is useful to implement asynchronous completion with
+|complete()|.
Other items are ignored.