runtime(nohlsearch): simplify mapping

Use <cmd> instead of <expr> with execute(...)[-1]

closes: #15047

Signed-off-by: Maxim Kim <habamax@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/usr_05.txt b/runtime/doc/usr_05.txt
index 5065e45..d922259 100644
--- a/runtime/doc/usr_05.txt
+++ b/runtime/doc/usr_05.txt
@@ -1,4 +1,4 @@
-*usr_05.txt*	For Vim version 9.1.  Last change: 2024 Jun 18
+*usr_05.txt*	For Vim version 9.1.  Last change: 2024 Jun 19
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -459,7 +459,7 @@
 Thus assuming default updatetime, hlsearch would be suspended/turned off after
 4 seconds of idle time.
 
-To disable the effect of the plugin after is has been loaded: >
+To disable the effect of the plugin after it has been loaded: >
 	au! nohlsearch
 <