Fix for failing KINGUseLongDateFormat test

Ok so reason for the test to fail was actually integration of both pull requests (#272 and #273).

In one PR I've fixed the issue that Quail inspects whole innerText of the scope element.

So in order to test that case I've nested `small` element inside `p` - which was the only one element taken as a scope back then.

Then in second PR I've expanded the list of supported scope elements, where `small` also got added to the supported scope elements. That's `small` element in the test was inspected, and caused test to fail.

Now as a solution I have changed the `small` element into the `font` (which is not in a supported tags list). In addition to that I've added a small comment in TC with short explaination.