Add advice to kill lines and join

init.el

@@ -247,13 +247,24 @@
   (tooltip-mode -1)
   (winner-mode +1)
 
-  ;; Bindings
+  ;;; Bindings
   (:global "M-SPC" cycle-spacing
            "M-/" hippie-expand
            "M-=" count-words
            "C-x C-b" ibuffer
            "C-c i" acdw/find-emacs-dotfiles
-           "C-x k" acdw/kill-a-buffer))
+           "C-x k" acdw/kill-a-buffer)
+
+  ;;; Advice
+  ;; `acdw/kill-line-and-join-advice' cribs from `crux-kill-and-join-forward'.
+  ;; I can't simply advise `kill-line' with an override from crux because crux
+  ;; itself calls `kill-line', leading to a infinite nesting situation.
+  (advice-add 'kill-line :around
+              (defun acdw/kill-line-and-join-advice (orig &rest args)
+                "If at end of line, join with following; otherwise kill line."
+                (if (and (eolp) (not (bolp)))
+                    (delete-indentation 1)
+                  (apply orig args)))))
 
 ;; Regular modes (`text-mode', `prog-mode', etc.)
 (defun acdw/setup-regular-modes ()