Add hook for verilog mode to disable tab indentation

.emacs.d/init.el

@@ -66,7 +66,8 @@
 		verilog-indent-level-behavioral 4
 		verilog-indent-level-declaration 4
 		verilog-indent-level-module 4
-		verilog-auto-newline nil))
+		verilog-auto-newline nil)
+  (add-hook 'verilog-mode-hook (lambda () (setq indent-tabs-mode nil))))
 ;;;; external packages (required)
 (use-package company :quelpa
   :config