chore(shfmt): add simplify to .editorconfig

Author: scop

.dir-locals.el

@@ -5,6 +5,5 @@
   (mode . ruff-format-on-save))
  (sh-mode
   (mode . shfmt-on-save)
-  (shfmt-arguments "-s")
   (flycheck-sh-bash-args "-O" "extglob")
   (sh-indent-comment . t)))

.editorconfig

@@ -9,6 +9,7 @@ insert_final_newline = true
 max_line_length = 79
 # for shfmt
 function_next_line = true
+simplify = true
 switch_case_indent = true
 
 [Makefile.am]