Night Owl theme img tag is broken on GitHub Pages

[Peter-Van-Drunen]

The img tag for the Night Owl theme shows up as text instead of a clickable image when viewing the README on the github.io page. This bug is not present on the regular README. See below

I'm not sure what could be causing this, but I thought I would bring it to the attention of someone who might.

[lannonbr]

I am thinking it may be with the styled quotes around the url and not having quotes around the width.

I will test it tonight and see if that is the case

[lannonbr]

@viatsko, could you take a look into this?

[WaylonWalker]

Fixed in #268. I honestly didn't see the issue before submitting. Please close.