[yt-dev] Issue #1239: annotate_contour doesn't work with RAMSES data (yt_analysis/yt)

[Rafael Ruggiero]

New issue 1239: annotate_contour doesn't work with RAMSES data
https://bitbucket.org/yt_analysis/yt/issues/1239/annotate_contour-doesnt-work-with-ramses

Rafael Ruggiero:

This simple script raises the following units error: http://paste.yt-project.org/show/6651/


```
#!python

import yt

ds = yt.load("output_00080/info_00080.txt")
slc = yt.SlicePlot(ds, 'z', 'density')
slc.annotate_contour("density")
slc.save()
```

The input file is the one available [here](http://yt-project.org/data/).