runtime(doc): Tweak documentation style a bit

closes: #16556

Signed-off-by: Christian Brabandt <cb@256bit.org>
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 1837661..6f5219c 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2025 Jan 17
+*builtin.txt*	For Vim version 9.1.  Last change: 2025 Feb 01
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -610,8 +610,7 @@
 sqrt({expr})			Float	square root of {expr}
 srand([{expr}])			List	get seed for |rand()|
 state([{what}])			String	current state of Vim
-str2blob({list} [, {options}])
-				Blob	convert list of strings into a Blob
+str2blob({list} [, {options}])	Blob	convert list of strings into a Blob
 str2float({expr} [, {quoted}])	Float	convert String to Float
 str2list({expr} [, {utf8}])	List	convert each character of {expr} to
 					ASCII/UTF-8 value