add test to ensure only <, > and & are escaped

test/runtime/samples/html-non-entities-inside-elements/_config.js

@@ -0,0 +1,5 @@
+export default {
+	html: `
+		<div>'foo'<span/></div>
+	`
+};

test/runtime/samples/html-non-entities-inside-elements/main.html

@@ -0,0 +1 @@
+<div>'foo'<span/></div>