patch 9.1.0314: Vim9: Can define a class in a function

Problem:  Vim9: Can define a class in a function
          (Doug Kearns)
Solution: Give an error for a class defined in a function,
          slightly reword some public error messages
          (Yegappan Lakshmanan)

fixes: #13184
fixes: #13326
closes: #14537

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/vim9.txt b/runtime/doc/vim9.txt
index ffb5c2e..7a49aa0 100644
--- a/runtime/doc/vim9.txt
+++ b/runtime/doc/vim9.txt
@@ -1,4 +1,4 @@
-*vim9.txt*	For Vim version 9.1.  Last change: 2024 Apr 12
+*vim9.txt*	For Vim version 9.1.  Last change: 2024 Apr 13
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1521,7 +1521,6 @@
 	:type MyList list<string>
 Custom types must start with a capital letter, to avoid name clashes with
 builtin types added later, similarly to user functions.
-{not implemented yet}
 
 And classes and interfaces can be used as types: >
 	:class MyClass