md4c/md4c.h: MD_DIALECT_GITHUB does not imply MD_FLAG_PERMISSIVEATXHEADERS. Since migration to Cmark-gfm, github.com does not accept them anymore.
diff --git a/md4c/md4c.h b/md4c/md4c.h
index ec173e5..a3b00fc 100644
--- a/md4c/md4c.h
+++ b/md4c/md4c.h
@@ -270,7 +270,7 @@ typedef struct MD_SPAN_IMG_DETAIL {
* possible given what features we implement.
*/
#define MD_DIALECT_COMMONMARK 0
-#define MD_DIALECT_GITHUB (MD_FLAG_PERMISSIVEATXHEADERS | MD_FLAG_PERMISSIVEAUTOLINKS | MD_FLAG_TABLES)
+#define MD_DIALECT_GITHUB (MD_FLAG_PERMISSIVEAUTOLINKS | MD_FLAG_TABLES)
/* Renderer structure.
*/