patch 9.1.0136: Vim9: need more test for exists()
methods

Problem:  Vim9: need more test for exists()
Solution: Add test for exists() with class/objct variables and methods
          (Yegappan Lakshmanan)

closes: #14088

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 849b180..0af9b0e 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Feb 24
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 Feb 25
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2405,11 +2405,11 @@
 			varname		internal variable (see
 			dict.key	|internal-variables|).  Also works
 			list[i]		for |curly-braces-names|, |Dictionary|
-			import.Func	entries, |List| items, imported
-					items, etc.
-					Does not work for local variables in a
-					compiled `:def` function.
-					Also works for a function in |Vim9|
+			import.Func	entries, |List| items, class and
+			class.Func	object methods, imported items, etc.
+			object.Func	Does not work for local variables in a
+			class.varname	compiled `:def` function.
+			object.varname	Also works for a function in |Vim9|
 					script, since it can be used as a
 					function reference.
 					Beware that evaluating an index may