Update runtime files

runtime/doc/builtin.txt

@@ -4399,8 +4399,11 @@ has({feature} [, {check}])
 
 has_key({dict}, {key})					*has_key()*
 		The result is a Number, which is TRUE if |Dictionary| {dict}
-		has an entry with key {key}.  FALSE otherwise. The {key}
-		argument is a string.
+		has an entry with key {key}.  FALSE otherwise.
+		The {key} argument is a string.  In |Vim9| script a number is
+		also accepted (and converted to a string) but no other types.
+		In legacy script the usual automatic conversion to string is
+		done.
 
 		Can also be used as a |method|: >
 			mydict->has_key(key)

runtime/doc/options.txt

@@ -799,7 +799,8 @@ A jump table for the options with a short description can be found at |Q_op|.
 	When on, Vim will change the current working directory whenever you
 	open a file, switch buffers, delete a buffer or open/close a window.
 	It will change to the directory containing the file which was opened
-	or selected.
+	or selected.  When a buffer has no name it also has no directory, thus
+	the current directory won't change when navigating to it.
 	Note: When this option is on some plugins may not work.
 
 			*'autoshelldir'* *'asd'* *'noautoshelldir'* *'noasd'*

runtime/doc/syntax.txt

@@ -4905,6 +4905,7 @@ Before the color scheme will be loaded all default color list scripts
 autocommand event is triggered.  After the color scheme has been loaded the
 |ColorScheme| autocommand event is triggered.
 
+						*colorscheme-override*
 If a color scheme is almost right, you can add modifications on top of it by
 using the |ColorScheme| autocommand.  For example, to remove the background
 color (can make it transparent in some terminals): >

runtime/doc/tags

@@ -6229,6 +6229,7 @@ collate-variable	eval.txt	/*collate-variable*
 color-schemes	syntax.txt	/*color-schemes*
 color-xterm	syntax.txt	/*color-xterm*
 coloring	syntax.txt	/*coloring*
+colorscheme-override	syntax.txt	/*colorscheme-override*
 colortest.vim	syntax.txt	/*colortest.vim*
 command-attributes	map.txt	/*command-attributes*
 command-block	vim9.txt	/*command-block*

runtime/doc/todo.txt

@@ -41,8 +41,6 @@ browser use: https://github.com/vim/vim/issues/1234
 Text props: Add "padding" argument - only for when using "text" and {col} is
 zero.  Use tp_len field and n_attr_skip. #10906
 
-Graduate FEAT_TEXTOBJ ?
-
 Further Vim9 improvements, possibly after launch:
 - Use Vim9 for more runtime files.
 - Check performance with callgrind and kcachegrind.