From d0642637d89201a77086c727e8052af3f3baeadc Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 9 Sep 2018 22:04:30 -0700
Subject: Check for whitespace before reference title.

Closes #263.
---
 src/inlines.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/inlines.c b/src/inlines.c
index bbda78f..171247e 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -1345,7 +1345,7 @@ bufsize_t cmark_parse_reference_inline(cmark_mem *mem, cmark_chunk *input,
   // parse optional link_title
   beforetitle = subj.pos;
   spnl(&subj);
-  matchlen = scan_link_title(&subj.input, subj.pos);
+  matchlen = subj.pos == beforetitle ? 0 : scan_link_title(&subj.input, subj.pos);
   if (matchlen) {
     title = cmark_chunk_dup(&subj.input, subj.pos, matchlen);
     subj.pos += matchlen;
-- 
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