replace cask with eldev

... also fix regex error found by `eldev lint`

Author: rudi

.dir-locals.el

@@ -2,7 +2,6 @@
 ;;; For more information see (info "(emacs) Directory Variables")
 
 ((emacs-lisp-mode
-  (elisp-lint-ignored-validators . ("fill-column"))
   (fill-column . 78)
   (indent-tabs-mode)))
 

.emacs/dependencies.el

@@ -3,8 +3,7 @@
 
 # generated files
 abs-mode-autoloads.el
-.cask
-.emacs/elpa/
-.emacs/quelpa/
-.emacs/.emacs-custom.el
-.elpa
+
+# Added automatically by ‘eldev init’.
+/.eldev
+/Eldev-local

.emacs/init.el

@@ -0,0 +1,8 @@
+; -*- mode: emacs-lisp; lexical-binding: t -*-
+
+(eldev-use-package-archive 'gnu-elpa)
+(eldev-use-package-archive 'melpa)
+(eldev-use-plugin 'autoloads)
+(eldev-use-plugin 'maintainer)
+(setq eldev-main-fileset '("abs-mode.el"))   ; ignore ob-abs.el for now
+(setq eldev-project-main-file "abs-mode.el") ; eldev doctor complains otherwise

.gitignore

@@ -1,6 +1,6 @@
 ;;; abs-mode.el --- Major mode for the modeling language Abs -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2010-2022  Rudolf Schlatte
+;; Copyright (C) 2010-2022, 2026  Rudolf Schlatte
 
 ;; Author: Rudi Schlatte <rudi@constantly.at>
 ;; URL: https://github.com/abstools/abs-mode
@@ -244,7 +244,7 @@ base model.")
    (list (concat "\\(" abs--id-regexp "\\)[[:space:]]*(") 1
          'abs-function-name-face)
    (cons (concat "\\(" abs--id-regexp "\\)") 'abs-variable-name-face)
-   (list "\\<\\(# \w+\\)\\>" 1 'font-lock-warning-face t))
+   (list "\\<\\(# \\w+\\)\\>" 1 'font-lock-warning-face t))
   "Abs keywords.")
 
 ;;; cc-mode wants different fontification levels, but we only offer one.
@@ -347,7 +347,7 @@ base model.")
 (defvar abs--outline-level (lambda () (1+ (/ (current-indentation) abs-indent))))
 
 (defun abs--read-backend ()
-  (interactive)
+  "Prompt the user to choose a backend."
   (let ((backend-name (completing-read "Backend: " abs--backends nil t nil nil abs-backend)))
     (intern-soft backend-name)))
 ;;; Minimal auto-insert mode support

Cask

@@ -1,6 +1,6 @@
 ;;; ob-abs.el --- org-babel functions for Abs -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2018 Rudolf Schlatte
+;; Copyright (C) 2018, 2026 Rudolf Schlatte
 
 ;; Author: Rudi Schlatte <rudi@constantly.at>
 ;; URL: https://github.com/abstools/abs-mode