[with patch; positive review] notebook bug -- %foo (or anything else) in a cell by itself (with nothing else in the cell) does not give an error but it *should*

[was]

This is probably easy to fix in server/notebook/worksheet.py

[was]

The attached patch:

1. Fixed the problem where %foobar with no input in the cell didn't give an error -- now it does, about

foobar not being defined.

2. While I was at it I improved how %foo modes in the notebook work, so that they can have everything on one line, e.g.,

      %magma Factorization(9038049823)
   

on a single line works in the notebook.

3. NOTE that the actual patch replaces a bunch of crappy hard to understand code with like 3 simple

lines that fix all of the above.

[boothby]

Great stuff! Works well, and makes the code cleaner!

[mabshoff]

Merged in Sage 3.0.2.alpha1