Update runtime files

runtime/doc/testing.txt

@@ -1,4 +1,4 @@
-*testing.txt*	For Vim version 8.2.  Last change: 2022 Jan 20
+*testing.txt*	For Vim version 8.2.  Last change: 2022 Jan 23
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -390,12 +390,12 @@ assert_fails({cmd} [, {error} [, {msg} [, {lnum} [, {context}]]]])
 <
 		If {msg} is empty then it is not used.  Do this to get the
 		default message when passing the {lnum} argument.
-
+							*E1115*
 		When {lnum} is present and not negative, and the {error}
 		argument is present and matches, then this is compared with
 		the line number at which the error was reported. That can be
 		the line number in a function or in a script.
-
+							*E1116*
 		When {context} is present it is used as a pattern and matched
 		against the context (script name or function name) where
 		{lnum} is located in.