Populate the name field on elements.

src/parser/horizontal_rule.rs

@@ -11,6 +11,7 @@ use nom::sequence::tuple;
 
 use super::keyword::affiliated_keyword;
 use super::org_source::OrgSource;
+use super::util::get_name;
 use crate::context::RefContext;
 use crate::error::Res;
 use crate::parser::util::start_of_line;
@@ -33,7 +34,7 @@ pub(crate) fn horizontal_rule<'b, 'g, 'r, 's>(
         remaining,
         HorizontalRule {
             source: rule.into(),
-            name: None, // TODO
+            name: get_name(&affiliated_keywords),
         },
     ))
 }