nit, add types in soy docs where missing.
@@ -173,7 +173,7 @@ HTML-tag templates can declare specific attributes that it requires using the
```soy
{template example kind="html<div>"}
- {@attribute aria-label}
+ {@attribute aria-label: string}
<div @aria-label></div>
{/template}
```
@@ -212,7 +212,7 @@ final DOM output if it is not passed in. The following will produce an empty
```soy
{template example kind="html<div>"}
- {@attribute? aria-label}
+ {@attribute? aria-label: string}
<div @aria-label></div>
{/template}
