From 6830c3339f70046183280ceaba83bcbc5c60634b Mon Sep 17 00:00:00 2001
From: Aidan Woods <aidantwoods@gmail.com>
Date: Fri, 9 Mar 2018 17:38:41 +0000
Subject: [PATCH] Readability

Thanks @PhrozenByte for the suggestion :)
---
 Parsedown.php | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Parsedown.php b/Parsedown.php
index 27a35bf..c0dbf08 100644
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -1142,10 +1142,10 @@ class Parsedown
 
     protected function inlineEmailTag($Excerpt)
     {
-        $commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@[a-zA-Z0-9]'
-            .'(?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?'
-            .'(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*'
-        ;
+        $hostnameLabel = '[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?';
+
+        $commonMarkEmail = '[a-zA-Z0-9.!#$%&\'*+\/=?^_`{|}~-]++@'
+            . $hostnameLabel . '(?:\.' . $hostnameLabel . ')*';
 
         if (strpos($Excerpt['text'], '>') !== false
             and preg_match("/^<((mailto:)?$commonMarkEmail)>/i", $Excerpt['text'], $matches)