elisp-refs-mode derives from special-mode, which already has q bound to quit-window. Most special mode derivatives leave this alone so quit-restore-window can decide what's the right thing to do next. With q bound to kill-buffer, quit-restore-window doesn't have a chance to run and leaves a duplicate window showing some already shown buffer when window managers like window-purpose is active.
Wilfred
commented
1 year ago
elisp-refs-modederives fromspecial-mode, which already hasqbound toquit-window. Most special mode derivatives leave this alone soquit-restore-windowcan decide what's the right thing to do next. Withqbound tokill-buffer,quit-restore-windowdoesn't have a chance to run and leaves a duplicate window showing some already shown buffer when window managers likewindow-purposeis active.