Fix.

node_modules/istanbul-reports/lib/html/templates/foot.txt

@@ -1,21 +0,0 @@
-<div class='push'></div><!-- for sticky footer -->
-</div><!-- /wrapper -->
-<div class='footer quiet pad2 space-top1 center small'>
-  Code coverage
-  generated by <a href="https://istanbul.js.org/" target="_blank">istanbul</a> at {{datetime}}
-</div>
-</div>
-{{#if prettify}}
-<script src="{{prettify.js}}"></script>
-<script>
-window.onload = function () {
-        if (typeof prettyPrint === 'function') {
-            prettyPrint();
-        }
-};
-</script>
-{{/if}}
-<script src="{{sorter.js}}"></script>
-<script src="{{blockNavigation.js}}"></script>
-</body>
-</html>