From fd1fd8a388b980cceacf2d032e8ac6a4a16ff5e1 Mon Sep 17 00:00:00 2001
From: Geoff McLane <ubuntu@geoffair.info>
Date: Sun, 28 Apr 2019 20:52:48 +0200
Subject: [PATCH] Is #815 - Use case-insensitive test 'html'

---
 src/lexer.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/lexer.c b/src/lexer.c
index ca66aee..fc2a4e3 100644
--- a/src/lexer.c
+++ b/src/lexer.c
@@ -1828,7 +1828,11 @@ static uint FindGivenVersion( TidyDocImpl* doc, Node* doctype )
 
     if (!fpi || !fpi->value) 
     {
-        if (doctype->element && (TY_(tmbstrcmp)(doctype->element,"html") == 0))
+        /*\
+         * Is. #815 - change to case-insensitive test
+         * See REC: https://www.w3.org/TR/html5/syntax.html#the-doctype
+        \*/
+        if (doctype->element && (TY_(tmbstrcasecmp)(doctype->element,"html") == 0))
         {
             return VERS_HTML5;  /* TODO: do we need to check MORE? */
         }