Not line number related, but this is displaying ```slashes:MITx+3.086r+2014_Spring```  from ```def make_datatable(self):``` which I would prefer to keep as the slashes, or at least allow the delete course function to use that string.  Also, the error for entering in a course id with ```slashes:MITx+3.086r+2014_Spring``` returns an ugly error message:
```
Error - cannot get course with ID slashes:MITx+21W.789x+1T2014
<class 'xmodule.modulestore.locations.Location'>: Invalid characters in u'slashes:MITx'.
```