refactor: use Doom utility function for indentation vars

config.org

@@ -974,7 +974,6 @@ fold
 :tools
 biblio
 debugger
-editorconfig
 (eval +overlay)
 (lookup +dictionary +docsets)
 make
@@ -1464,6 +1463,25 @@ Corfu's posframe buffer shouldn't be numbered by =winum=:
   (push " *corfu*" winum-ignored-buffers))
 #+end_src
 
+** EditorConfig
+
+#+call: confpkg("Pkg: editorconfig")
+
+#+begin_src emacs-lisp :noweb-ref doom-module
+:tools editorconfig
+#+end_src
+
+The convenience function ~set-editorconfig-indent-var!~ provided by Doom is just wrong. Here's a patch.
+
+#+begin_src emacs-lisp
+(defpatch! (symbol-function #'set-editorconfig-indent-var!)
+    (defun set-editorconfig-indent-var!) (mode &rest vars)
+  "Add (MODE VARS...) to `editorconfig-indentation-alist'."
+  (after! editorconfig
+    (nconc editorconfig-indentation-alist
+           (el-patch-wrap 1 (list (cons mode vars))))))
+#+end_src
+
 ** Eldoc
 
 #+call: confpkg("Pkg: eldoc")
@@ -4533,11 +4551,8 @@ The Agda integration with Markdown specifically requires some changes to the pol
 
 *** Indentation
 
-EditorConfig can't find this mode's indentation variables itself, so we'll have to tell it where they are.
-
 #+begin_src emacs-lisp
-(after! editorconfig
+(set-editorconfig-indent-var! 'nix-ts-mode 'nix-ts-mode-indent-offset)
-  (push '(nix-ts-mode nix-ts-mode-indent-offset) editorconfig-indentation-alist))
 #+end_src
 
 ** Python
@@ -4556,6 +4571,12 @@ EditorConfig can't find this mode's indentation variables itself, so we'll have
 :lang (qt +lsp +tree-sitter)
 #+end_src
 
+*** Indentation
+
+#+begin_src emacs-lisp
+(set-editorconfig-indent-var! 'qml-ts-mode 'qml-ts-mode-indent-offset)
+#+end_src
+
 ** Rust
 
 #+call: confpkg("Mode: Rust")