From 30e7cf83fbf25ae6e20c61ded8d6326c2abdd0fb Mon Sep 17 00:00:00 2001
From: Colin O'Dell <colinodell@gmail.com>
Date: Tue, 22 Nov 2016 09:23:38 -0500
Subject: [PATCH] Allow tab after setext header line (see
 jgm/commonmark.js#109)

---
 src/Block/Parser/SetExtHeadingParser.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Block/Parser/SetExtHeadingParser.php b/src/Block/Parser/SetExtHeadingParser.php
index 5a20a6e64d..23de37063c 100644
--- a/src/Block/Parser/SetExtHeadingParser.php
+++ b/src/Block/Parser/SetExtHeadingParser.php
@@ -38,7 +38,7 @@ public function parse(ContextInterface $context, Cursor $cursor)
             return false;
         }
 
-        $match = RegexHelper::matchAll('/^(?:=+|-+) *$/', $cursor->getLine(), $cursor->getFirstNonSpacePosition());
+        $match = RegexHelper::matchAll('/^(?:=+|-+)[ \t]*$/', $cursor->getLine(), $cursor->getFirstNonSpacePosition());
         if ($match === null) {
             return false;
         }