Fixed cases like

```
[ref]: url
"title" ok
```

Here we should parse the first line as a reference.

1 files changed, 9 insertions, 1 deletions

diff --git a/src/inlines.c b/src/inlines.c
index 28250e1..f4daeb1 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -1196,7 +1196,15 @@ bufsize_t cmark_parse_reference_inline(cmark_strbuf *input, cmark_reference_map
 	// parse final spaces and newline:
 	skip_spaces(&subj);
 	if (!skip_line_end(&subj)) {
-		return 0;
+		if (matchlen) { // try rewinding before title
+			subj.pos = beforetitle;
+			skip_spaces(&subj);
+			if (!skip_line_end(&subj)) {
+				return 0;
+			}
+		} else {
+			return 0;
+		}
 	}
 	// insert reference into refmap
 	cmark_reference_create(refmap, &lab, &url, &title);