From a7b51ebecd35e319a6fe7f8928303dd555449742 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADtor=20Galv=C3=A3o?= <info@vitorgalvao.com>
Date: Mon, 1 Jun 2020 14:18:54 +0100
Subject: [PATCH] Cask: use regex in appcast adjusted_version_stanza

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

diff --git a/Library/Homebrew/cask/audit.rb b/Library/Homebrew/cask/audit.rb
index b095905211..244c9a22d5 100644
--- a/Library/Homebrew/cask/audit.rb
+++ b/Library/Homebrew/cask/audit.rb
@@ -314,7 +314,7 @@ module Cask
                                       "--globoff", "--max-time", "5", appcast_stanza)
       version_stanza = cask.version.to_s
       adjusted_version_stanza = if cask.appcast.configuration.blank?
-        version_stanza.split(",")[0].split("-")[0].split("_")[0]
+        version_stanza.match(/^[[:alnum:].]+/)[0]
       else
         cask.appcast.configuration
       end