From 67231cbae1b74bb714c2b4c0978406acbdc151ef Mon Sep 17 00:00:00 2001
From: Aidan Woods <aidantwoods@gmail.com>
Date: Tue, 22 Jan 2019 21:34:46 +0000
Subject: [PATCH] Tabs are allowed after header delimiter

---
 src/Components/Blocks/Header.php | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/Components/Blocks/Header.php b/src/Components/Blocks/Header.php
index 2be344f..bdae2be 100644
--- a/src/Components/Blocks/Header.php
+++ b/src/Components/Blocks/Header.php
@@ -60,11 +60,14 @@ final class Header implements Block
 
         $StrictMode = $State->getOrDefault(StrictMode::class);
 
-        if ($StrictMode->isEnabled() && isset($text[0]) and $text[0] !== ' ') {
+        if (
+            $StrictMode->isEnabled() && isset($text[0])
+            and $text[0] !== ' ' and $text[0] !== "\t"
+        ) {
             return null;
         }
 
-        $text = \trim($text, ' ');
+        $text = \trim($text, " \t");
 
         return new self($text, $level);
     }