[with patch, with positive review] bug in parametric_plot

[wdj]

sage: parametric_plot([t, t + RR(pi)], -2, 2, rgbcolor=(1,0,0))

works but not this:

sage: parametric_plot([t, t + pi], -2, 2, rgbcolor=(1,0,0))

---

<type 'exceptions.AttributeError?'> Traceback (most recent call last)

....

<type 'exceptions.AttributeError?'>: 'Pi' object has no attribute 'number_of_arguments'

[mabshoff]

Looks good to me.

Cheers,

Michael

[mabshoff]

Merged in Sage 2.10.1.alpha1

[mabshoff]

Merged in Sage 2.10.1.alpha1 - and this time I closed the ticket, too.