From 82fc65686378be7526249b92ddf9214a314bb8f8 Mon Sep 17 00:00:00 2001
From: Geoff McLane <ubuntu@geffair.info>
Date: Sun, 18 Jan 2015 14:46:12 +0100
Subject: [PATCH] exception attr tabindex can begin with '-'

---
 src/attrs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/attrs.c b/src/attrs.c
index 8783248..04fbc49 100644
--- a/src/attrs.c
+++ b/src/attrs.c
@@ -1763,6 +1763,9 @@ void CheckNumber( TidyDocImpl* doc, Node *node, AttVal *attval)
     /* font size may be preceded by + or - */
     if ( nodeIsFONT(node) && (*p == '+' || *p == '-') )
         ++p;
+    /* tabindex may be preceeded by - */
+    if (attval->attribute && (strcmp(attval->attribute,"tabindex") == 0) && (*p == '-'))
+        ++p;
 
     while (*p)
     {