refactor!(lib): set-indent-vars!: change signature

BREAKING CHANGE: Changes `set-indent-vars!`s arity from 1+N to 2, so:

  (set-indent-vars! 'some-mode 'var1 'var2 'var3)

To

  (set-indent-vars! 'some-mode '(var1 var2 var3))

In preparation for a plist argument in the future.

lisp/lib/indent.el

@@ -6,24 +6,26 @@
   (defvar doom-indent-excluded-modes '(special-mode org-mode)
     "Modes not to no-op `doom-set-indent' in.")
 
-  (defun set-indent-vars! (modes &rest vars)
+  (defun set-indent-vars! (modes vars)
     "Register VARS as the tab-width proxy variables for each of major MODES.
 
 `tab-width' and `standard-indent' will be set to match the values of these
 variables in their respective buffers. Failing that, a best-guess effort will be
 made to find an appropriate variable to use.
 
-if MODES is `t', VARS will be made to match `tab-width' in all major modes.
+If MODES is `t', VARS will be made to match `tab-width' in all major modes.
+Both MODES and VARS can be a single symbol or a list thereof.
 
 Note that it's not necessary to register indent variables if they end in
 MODE-ts-mode-indent-offset, MODE-indent-offset, MODE-indent-level,
 MODE-tab-width, or MODE-basic-offset. It is also not necessary if you have
 `dtrt-indent' installed and a variable association exists in
 `dtrt-indent-hook-mapping-list'."
-    (if (eq modes t)
-        (put 'tab-width 'indent-vars vars)
-      (dolist (mode (ensure-list modes))
-        (put mode 'indent-vars vars))))
+    (let ((vars (ensure-list vars)))
+      (if (eq modes t)
+          (put 'tab-width 'indent-vars vars)
+        (dolist (mode modes)
+          (put mode 'indent-vars vars)))))
 
   (defun doom-indent-var-for-mode (mode)
     "Try to guess MODE's indent offset variable based on heuristics.

modules/lang/data/config.el

@@ -12,7 +12,7 @@
     (sp-local-pair 'nxml-mode "<" ">" :post-handlers '(("[d1]" "/"))))
   (set-company-backend! 'nxml-mode '(company-nxml company-yasnippet))
   (set-formatter! 'xmllint '("xmllint" "--format" "-") :modes '(nxml-mode))
-  (set-indent-vars! 'nxml-mode 'nxml-child-indent 'nxml-attribute-indent))
+  (set-indent-vars! 'nxml-mode '(nxml-child-indent nxml-attribute-indent)))
 
 
 ;;;###package csv-mode

modules/lang/fortran/config.el

@@ -16,14 +16,10 @@
       compilation-buffer-name-function #'+fortran-compilation-buffer-name-fn))
   (set-popup-rule! "^\\*fortran-compilation" :side 'right :size 0.5 :quit t)
 
-  (set-indent-vars! 'f90-mode
-                    'f90-associate-indent
-                    'f90-continuation-indent
-                    'f90-critical-indent
-                    'f90-do-indent
-                    'f90-if-indent
-                    'f90-program-indent
-                    'f90-type-indent)
+  (set-indent-vars!
+   'f90-mode '(f90-associate-indent f90-continuation-indent
+               f90-critical-indent f90-do-indent f90-if-indent
+               f90-program-indent f90-type-indent))
 
   ;; --- LSP Configuration --- ;;
   (when (modulep! +lsp)

modules/lang/fsharp/config.el

@@ -12,7 +12,7 @@
     (set-company-backend! 'fsharp-mode 'fsharp-ac/company-backend))
   (set-repl-handler! 'fsharp-mode #'run-fsharp)
   (set-formatter! 'fantomas '("fantomas" "--stdin") :modes '(fsharp-mode))
-  (set-indent-vars! 'fsharp-mode 'fsharp-indent-offset 'fsharp-continuation-offset)
+  (set-indent-vars! 'fsharp-mode '(fsharp-indent-offset fsharp-continuation-offset))
   (map! :localleader
         :map fsharp-mode-map
         "b" #'fsharp-ac/pop-gotodefn-stack ; Useful for re-tracing your steps