Support blank lines for descriptive list with empty value before final list item.

src/parser/plain_list.rs

@@ -187,7 +187,11 @@ fn plain_list_item<'b, 'g, 'r, 's>(
     )(&parser_context))(remaining);
     match maybe_contentless_item {
         Ok((_rem, _ws)) => {
-            let (remaining, _trailing_ws) = opt(blank_line)(remaining)?;
+            let (remaining, _trailing_ws) = if context.should_consume_trailing_whitespace() {
+                recognize(many0(blank_line))(remaining)?
+            } else {
+                recognize(opt(blank_line))(remaining)?
+            };
             let source = get_consumed(input, remaining);
             return Ok((
                 remaining,
@@ -245,6 +249,7 @@ fn plain_list_item<'b, 'g, 'r, 's>(
     ));
 }
 
+#[derive(Debug)]
 enum BulletType {
     Ordered,
     Unordered,