patch 8.2.0688: output clobbered if setting 'verbose' to see shell commands

Problem:    Output clobbered if setting 'verbose' to see shell commands.
Solution:   Only output "Searching for" when 'verbose' is 11 or higher.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index baccd25..c29ff5e 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -8323,9 +8323,11 @@
 	Currently, these messages are given:
 	>= 1	When the viminfo file is read or written.
 	>= 2	When a file is ":source"'ed.
+	>= 4	Shell commands.
 	>= 5	Every searched tags file and include file.
 	>= 8	Files for which a group of autocommands is executed.
 	>= 9	Every executed autocommand.
+	>= 11	Finding items in a path
 	>= 12	Every executed function.
 	>= 13	When an exception is thrown, caught, finished, or discarded.
 	>= 14	Anything pending in a ":finally" clause.