add test

test/runtime/samples/component-static-at-symbol/Email.html

@@ -0,0 +1 @@
+<a href='mailto:{{address}}'>email</a>

test/runtime/samples/component-static-at-symbol/_config.js

@@ -0,0 +1,3 @@
+export default {
+	html: `<a href='mailto:hello@example.com'>email</a>`
+};

test/runtime/samples/component-static-at-symbol/main.html

@@ -0,0 +1,9 @@
+<Email address='hello@example.com'/>
+
+<script>
+	import Email from './Email.html';
+
+	export default {
+		components: { Email },
+	};
+</script>