Bug with code blocks(categories?) parsing

[rustamgasanov]

Steps to reproduce: create a new post with the following content

---
layout: post
title: "1"
date: 2015-11-04 19:39:31 -0500
comments: true
categories: 
  - cat

---

``` html 1
...
<div><p>1</p></div>
...
```

``` html 2
...
<div><p>2</p></div>
...
```

Run rake generate or rake preview. The following error appears:

Error: Pygments can't parse unknown language: </p>.
Error: Run jekyll build --trace for more information.

By experimenting, I found that error disappears if you remove all categories

[dgmstuart]

Is it related to this? imathis/octopress#1651 (comment)

[jingsam]

In Octopress 3，you should use

octopress new post [title]
jekyll serve

Do not try to use rake in Octopress 3!