nits

fetch.bs

@@ -273,7 +273,7 @@ to perform certain actions in the context of that fetch instance.
 <p>A <a for=/>fetch controller</a> has an associated <a for=/>fetch params</a>
 <dfn for="fetch controller">ongoing fetch params</dfn>.</p>
 
-<p>To <dfn id="concept-fetch-terminate" for="fetch controller">terminate</dfn> a
+<p>To <dfn export id="concept-fetch-terminate" for="fetch controller">terminate</dfn> a
 <a for=/>fetch controller</a> <var>controller</var>, <a for="fetch params">terminate</a>
 <var>controller</var>'s <a for="fetch controller">ongoing fetch params</a>.