Highlight.js is not compatible with Hugo.

[izdwuut]

Hi there!

I have noticed that while highlight.js runs on the site, a code snippet with line numbers (linenos parameter set to table) enabled gets displayed wrong. The library doesn't come with line numbering feature thus I think that it's not fully compatible with Hugo and it shouldn't be used with it. Related themes simply don't come with required CSS rules.

Here's a related PR with my suggested changes.

Steps to reproduce:

1. Create a Hugo site using hugo-paper theme.
2. Write the following post in markdown:

{{< highlight python "linenos=table" >}}
var = 2
if var is 2:
    print("Hello world!")
{{< / highlight >}}

3. Code snippets with line numbers enabled should display incorrectly. It also messes with the shortcode without params:

Tested browsers:

• Firefox Developer Edition 63.0b9 (64-bit)
• Chrome Version 69.0.3497.100 (Official Build) (64-bit)
• Microsoft Edge 40.15063.674.0