Ignore the failing test.

build.rs

@@ -72,6 +72,7 @@ fn is_expect_fail(name: &str) -> Option<&str> {
     match name {
         "drawer_drawer_with_headline_inside" => Some("Apparently lines with :end: become their own paragraph. This odd behavior needs to be investigated more."),
         "element_container_priority_footnote_definition_dynamic_block" => Some("Apparently broken begin lines become their own paragraph."),
+        "keyword_affiliated_keyword" => Some("Affiliated keywords would have to be implemented first."),
         _ => None,
     }
 }