Update runtime files.
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 5be1890..4e4cff0 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -1,4 +1,4 @@
-*testing.txt* For Vim version 8.2. Last change: 2020 Dec 12
+*testing.txt* For Vim version 8.2. Last change: 2021 Mar 10
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -168,6 +168,7 @@
wait time of up to 3 seconds for messages
term_props reset all terminal properties when the version
string is detected
+ uptime overrules sysinfo.uptime
ALL clear all overrides ({val} is not used)
"starting" is to be used when a test should behave like