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Because of this answer I set fill-prefix to "". When I do this explicitly via M-: it works as expected.

I need a solution for use-package here.

When I try to make this setting specific to org-roam buffers the behaviour is not as expected and C-h d RET fill-prefix still tells me that it is nil.

I set it in the :config section like this.

(use-package org-roam
  :init
  (setq org-roam-v2-ack t)  ; do not show migration warning after startup
  :custom
  (org-roam-directory "~/tab-cloud/my.org-roam")
  :bind (("C-c n l" . org-roam-buffer-toggle)
     ("C-c n f" . org-roam-node-find)
     ("C-c n i" . org-roam-node-insert)
     :map org-mode-map
     ("C-M-i" . completion-at-point)
     )
  :config
  (org-roam-db-autosync-mode)
  (setq fill-prefix "")  ;; see https://emacs.stackexchange.com/a/38943/12999
      )
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  • 1
    Try setting it globally in your init file or customizing it. Are you trying to make it buffer-local for org-roam buffers only?
    – NickD
    Commented Mar 31, 2022 at 17:50
  • Yes. org-roam buffers only. Makeing it global does not explain why my "solution" doesn't work. What do you mean with "customizing"?
    – buhtz
    Commented Mar 31, 2022 at 20:14
  • 1
    Using the Customize interface: do C-h v fill-prefix and click on the customize link. But that's also a global change, so it won't work for what you want to do.
    – NickD
    Commented Mar 31, 2022 at 20:31
  • 1
    I don't know how to use use-package, but you should be able to do it the old fashioned way by adding the setter to the major mode hook: (add-hook 'org-roam-mode-hook (lambda () (setq fill-prefix ""))).
    – NickD
    Commented Mar 31, 2022 at 20:35

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