Add fragment syntax back to README

Author: davepeck

README.md

@@ -385,6 +385,21 @@ result = html(t"<ul><{Items} /></ul>")
 assert str(result) == "<ul><li>first</li><li>second</li></ul>"
 ```
 
+If you prefer, you can use **explicit fragment syntax** to wrap multiple
+
+
+elements in a `Fragment`:
+
+```python
+def Items() -> Node:
+    return html(t'<><li>first</li><li>second</li></>')
+
+result = html(t'<ul><{Items} /></ul>')
+assert str(result) == "<ul><li>first</li><li>second</li></ul>"
+```
+
+This is not required, but it can make your intent clearer.
+
 #### Class-based components
 
 Component functions are great for simple use cases, but for more complex