patch 8.2.4157: terminal test fails because Windows sets the title
Problem: Terminal test fails because Windows sets the title.
Solution: Add the "vterm_title" testing override and use it in the test.
(Ozaki Kiichi, closes #9556)
diff --git a/runtime/doc/testing.txt b/runtime/doc/testing.txt
index 0459aa3..2811568 100644
--- a/runtime/doc/testing.txt
+++ b/runtime/doc/testing.txt
@@ -208,6 +208,8 @@
ui_delay time in msec to use in ui_delay(); overrules a
wait time of up to 3 seconds for messages
uptime overrules sysinfo.uptime
+ vterm_title setting the window title by a job running in a
+ terminal window
ALL clear all overrides ({val} is not used)
"starting" is to be used when a test should behave like