Prefer setq-local in erc

* lisp/erc/erc-goodies.el (erc-imenu-setup):
* lisp/erc/erc-list.el (erc-list-install-322-handler, erc-cmd-LIST):
* lisp/erc/erc-pcomplete.el (pcomplete-erc-setup):
* lisp/erc/erc.el (erc-mode, erc-update-mode-line-buffer):
Prefer setq-local.

4 files changed, 23 insertions, 27 deletions

diff --git a/lisp/erc/erc-goodies.el b/lisp/erc/erc-goodies.el
index a475f0a1770..350eb89b666 100644
--- a/lisp/erc/erc-goodies.el
+++ b/lisp/erc/erc-goodies.el
@@ -35,8 +35,7 @@
 
 (defun erc-imenu-setup ()
   "Setup Imenu support in an ERC buffer."
-  (set (make-local-variable 'imenu-create-index-function)
-       'erc-create-imenu-index))
+  (setq-local imenu-create-index-function #'erc-create-imenu-index))
 
 (add-hook 'erc-mode-hook 'erc-imenu-setup)
 (autoload 'erc-create-imenu-index "erc-imenu" "Imenu index creation function")
diff --git a/lisp/erc/erc-list.el b/lisp/erc/erc-list.el
index 036d7733ed7..ae7c2e5f2fa 100644
--- a/lisp/erc/erc-list.el
+++ b/lisp/erc/erc-list.el
@@ -188,15 +188,15 @@
      (lambda (_proc _parsed)
 	(remove-hook 'erc-server-322-functions 'erc-list-handle-322 t)))
     ;; Find the list buffer, empty it, and display it.
-    (set (make-local-variable 'erc-list-buffer)
-	 (get-buffer-create (concat "*Channels of "
-				    erc-server-announced-name
-				    "*")))
+    (setq-local erc-list-buffer
+                (get-buffer-create (concat "*Channels of "
+                                           erc-server-announced-name
+                                           "*")))
     (with-current-buffer erc-list-buffer
       (erc-list-menu-mode)
       (setq buffer-read-only nil)
       (erase-buffer)
-      (set (make-local-variable 'erc-list-server-buffer) server-buffer)
+      (setq-local erc-list-server-buffer server-buffer)
       (setq buffer-read-only t))
     (pop-to-buffer erc-list-buffer))
   t)
@@ -211,7 +211,7 @@ should usually be one or more channels, separated by commas.
 Please note that this function only works with IRC servers which conform
 to RFC and send the LIST header (#321) at start of list transmission."
   (erc-with-server-buffer
-   (set (make-local-variable 'erc-list-last-argument) line)
+   (setq-local erc-list-last-argument line)
    (erc-once-with-server-event
     321
     (let ((buf (current-buffer)))
diff --git a/lisp/erc/erc-pcomplete.el b/lisp/erc/erc-pcomplete.el
index f8b7e13be02..c4932f2bde2 100644
--- a/lisp/erc/erc-pcomplete.el
+++ b/lisp/erc/erc-pcomplete.el
@@ -89,18 +89,16 @@ for use on `completion-at-point-function'."
 
 (defun pcomplete-erc-setup ()
   "Setup `erc-mode' to use pcomplete."
-  (set (make-local-variable 'pcomplete-ignore-case)
-       t)
-  (set (make-local-variable 'pcomplete-use-paring)
-       nil)
-  (set (make-local-variable 'pcomplete-parse-arguments-function)
-       'pcomplete-erc-parse-arguments)
-  (set (make-local-variable 'pcomplete-command-completion-function)
-       'pcomplete/erc-mode/complete-command)
-  (set (make-local-variable 'pcomplete-command-name-function)
-       'pcomplete-erc-command-name)
-  (set (make-local-variable 'pcomplete-default-completion-function)
-       (lambda () (pcomplete-here (pcomplete-erc-nicks)))))
+  (setq-local pcomplete-ignore-case t)
+  (setq-local pcomplete-use-paring nil)
+  (setq-local pcomplete-parse-arguments-function
+              #'pcomplete-erc-parse-arguments)
+  (setq-local pcomplete-command-completion-function
+              #'pcomplete/erc-mode/complete-command)
+  (setq-local pcomplete-command-name-function
+              #'pcomplete-erc-command-name)
+  (setq-local pcomplete-default-completion-function
+              (lambda () (pcomplete-here (pcomplete-erc-nicks)))))
 
 ;;; Programmable completion logic
 
diff --git a/lisp/erc/erc.el b/lisp/erc/erc.el
index 94ea0de7ee7..d0b511dc0a2 100644
--- a/lisp/erc/erc.el
+++ b/lisp/erc/erc.el
@@ -1488,12 +1488,12 @@ Defaults to the server buffer."
 (define-derived-mode erc-mode fundamental-mode "ERC"
   "Major mode for Emacs IRC."
   (setq local-abbrev-table erc-mode-abbrev-table)
-  (set (make-local-variable 'next-line-add-newlines) nil)
+  (setq-local next-line-add-newlines nil)
   (setq line-move-ignore-invisible t)
-  (set (make-local-variable 'paragraph-separate)
-       (concat "\C-l\\|\\(^" (regexp-quote (erc-prompt)) "\\)"))
-  (set (make-local-variable 'paragraph-start)
-       (concat "\\(" (regexp-quote (erc-prompt)) "\\)"))
+  (setq-local paragraph-separate
+              (concat "\C-l\\|\\(^" (regexp-quote (erc-prompt)) "\\)"))
+  (setq-local paragraph-start
+              (concat "\\(" (regexp-quote (erc-prompt)) "\\)"))
   (setq-local completion-ignore-case t)
   (add-hook 'completion-at-point-functions 'erc-complete-word-at-point nil t))
 
@@ -6493,8 +6493,7 @@ if `erc-away' is non-nil."
                           (format-spec erc-header-line-format spec)
                         nil)))
           (cond (erc-header-line-uses-tabbar-p
-                 (set (make-local-variable 'tabbar--local-hlf)
-                      header-line-format)
+                 (setq-local tabbar--local-hlf header-line-format)
                  (kill-local-variable 'header-line-format))
                 ((null header)
                  (setq header-line-format nil))