ipython/ipython — pull request #4232 by minrk (2013-09-19 06:20:42+00:00)
Title: no highlight if no language specified

This matches behavior of places like GitHub, where if you do not specify a language, e.g.

```
no_highlighting("here")
```

There is no syntax highlighting. You must do

```python
def foo(a="hi"):
return 5
```

to enable highlighting in a particular language.

With configuration as it is right now in IPython, it is impossible to disable syntax highlighting in markdown blocks.