Self closing `<i/>` tags result in all subsequent paragraphs being italic

[dstaley]

When a paragraph contains a self closing italic tag <i/>, the resulting kepub has all subsequent paragraphs in italic. Based on my reading of the net/html fork used, I believe this is because <i> is not one of the specific tags allowed to be self closing.

Here is a sample from an EPUB purchased from Tor Books:

<p>Lopen ended up sprawled against a boulder, upside down, ribs screaming as they knit back together with Stormlight.<i/></p>
<p>“Radiant Lopen!” Kstled said, ducking in close. “Are you all right?”</p>
<p>“Feel like a piece of snot,” Lopen said, groaning, “following a sneeze.” He peeled himself off the rock and flopped down next to Kstled. “My spear can’t get through that thing’s carapace.”</p>

And this is the resulting kepub from the same snippet:

<p><span class="koboSpan" id="kobo.11.1">Lopen ended up sprawled against a boulder, upside down, ribs screaming as they knit back together with Stormlight.</span><i></i></p><i>
<p><span class="koboSpan" id="kobo.12.1">“Radiant Lopen!” </span><span class="koboSpan" id="kobo.12.2">Kstled said, ducking in close. </span><span class="koboSpan" id="kobo.12.3">“Are you all right?”</span></p>
<p><span class="koboSpan" id="kobo.13.1">“Feel like a piece of snot,” Lopen said, groaning, “following a sneeze.” </span><span class="koboSpan" id="kobo.13.2">He peeled himself off the rock and flopped down next to Kstled. </span><span class="koboSpan" id="kobo.13.3">“My spear can’t get through that thing’s carapace.”</span></p>

The first paragraph contains an expanded empty <i></i> tag, but ends in an opening <i> tag, which results in the remainder of the chapter being rendered in italics.

[pgaskin]

I already have some code I'm using in other projects to deal with this. I'll fix it when I get around to updating kepubify.