[vim/vim] autochdir does not respect `No Name` buffers (Issue #10923)

[ad_chaos]

Steps to reproduce

vim --clean
:set autochdir
:h h
:pwd (should say the runtime path)
<C-w>j
:pwd (also says the runtime path)

Expected behaviour

When switching windows (from the help window to the No Name buffer) the cwd should also be changed

I am not sure if this is a bug or a feature request, because the doc says

			*'autochdir'* *'acd'* *'noautochdir'* *'noacd'*
'autochdir' 'acd'	boolean (default off)
			global
	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.
	Note: When this option is on some plugins may not work.

Which mentions:-

It will change to the directory containing the file which was opened or selected.

but then also says:-

When on, Vim will change the current working directory whenever you open a file, switch buffers

So maybe either the docs need updating to be more clear or maybe make the No Name buffer also have a cwd attached to it :)

Version of Vim

VIM - Vi IMproved 9.0 (Included patches: 1-200)

Environment

Operating System: macOs
Terminal: Kitty
$TERM: xterm-kitty
Shell: zsh

Logs and stack traces

No response

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[zeertzjq]

What do you expect the cwd to be changed to?

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[ad_chaos]

To the one from which I started nvim from

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[Bram Moolenaar]

A buffer without a name is not associated with any directory. Thus 'autochdir' doesn't do anything when making such a buffer the current one. Since when using 'autochdir' you constantly change directory, using the current directory of when the buffer was created, e.g. with ":new", is likely more confusing than helpful. I'll add a remark in the help about this.

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[Bram Moolenaar]

Closed #10923 as completed.

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