From b792a4f645b613ba7e9337777dabbfd92dbfc3a5 Mon Sep 17 00:00:00 2001
From: Max Eisner <4730112+max-ae@users.noreply.github.com>
Date: Sun, 31 Jul 2022 21:48:02 +0200
Subject: [PATCH] fix TypeError

---
 Library/Homebrew/formula.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index fd2ccb0a65..cf1ad0deb1 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -1659,7 +1659,7 @@ class Formula
       elsif shell_parameter_format == :arg
         "--shell=#{shell}"
       elsif shell_parameter_format == :none
-        nil
+        ""
       else
         "#{shell_parameter_format}#{shell}"
       end