### No output when documentation say it should be

Hi all,

Consider http://doc.sagemath.org/html/en/reference/manifolds/sage/manifolds/differentiable/affine_connection.html
The very last command of this web page is

```
sage: for i in M.irange():
nab.torsion_form(i, e) == ef[i].exterior_derivative() + \
sum(nab.connection_form(i,j,e).wedge(ef[j]) for j in M.irange())
```

The output of this command should be: True, True, True, but I get no output at all.
In order to duplicate you should include also the previous commands beginning from the `torsion_form`

definition, over all 3 cells.

Daniel