bug#18133: Suppressing asynchronous command output

[martin rudalics]

> ​I meant the second, just adding the (buffer-name-string .
> display-buffer-no-window) pair to the value menu.

Which value menu?  ‘display-buffer-alist’ is a user option - its
original value must be nil, no code is allowed to add anything to it.
If an application urgently wants to override the user, it can use
‘display-buffer-overriding-action’.

Or do you just want to add ‘display-buffer-no-window’ to
‘display-buffer--action-function-custom-type’?

martin