runtime(doc): grammar & typo fixes

closes: #13654
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 657fe8d..6f05055 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.0.  Last change: 2023 Nov 20
+*builtin.txt*	For Vim version 9.0.  Last change: 2023 Dec 14
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -6688,9 +6688,9 @@
 <		This limits the length of the text used from "line" to
 		"width" bytes.
 
-		If the argument to be formatted is specified using a posional
-		argument specifier, and a '*' is used to indicate that a
-		number argument is to be used to specify the width or
+		If the argument to be formatted is specified using a
+		positional argument specifier, and a '*' is used to indicate
+		that a number argument is to be used to specify the width or
 		precision, the argument(s) to be used must also be specified
 		using a {n$} positional argument specifier. See |printf-$|.