Added example code blocks

docs/trusted_types.rst

@@ -84,6 +84,7 @@ based on the sink context. Each policy should be given a distinct name.
 Here is an example policy that sanitizes HTML by escaping the ``<`` character.
 
 .. code-block:: javascript
+
 	if (window.trustedTypes && trustedTypes.createPolicy) {
     	const escapeHTMLPolicy = trustedTypes.createPolicy('myEscapePolicy', {
     		createHTML: string => string.replace(/\</g, '&lt;')
@@ -93,6 +94,7 @@ Here is an example policy that sanitizes HTML by escaping the ``<`` character.
 Here is an example of how that policy can be used.
 
 .. code-block:: javascript
+
 	const escaped = escapeHTMLPolicy.createHTML('<img src=x onerror=alert(1)>');
 	console.log(escaped instanceof TrustedHTML);
 	el.innerHTML = escaped;