After run this coding question there is no inserted line under the "by some author" even there are <i><i/> tags with it, why?

Question

Because <i><i/> tags means iserted Text

Answer 1

You wrote the tag the wrong way. It stands for <i></i>
I don't know if that is the problem, but maybe it is

Answer 2

You need to close the tags like this
<tag></tag>

But for self closing tags
<tag/>

Answer 3

<i> is for italic text. It's closing tag will be </i>