Magma command for modular form does not work

[jwj61]

I the magma file for downloading the form 633.1.m.b, it suggests the command "MakeCharacter_633_m_Hecke();", but typing this (after loading the file) gives an error.

[edgarcosta]

Perhaps Kf shouldn't be an argument, otherwise we need to suggest

> MakeCharacter_633_m_Hecke(NumberField(Polynomial([1,0,-1,0,1,0,-1,0,1])));
$.1*$.2^2

[JohnCremona]

#5397 was created to try to avoid this sort of thing

[edgarcosta]

I don't follow. We are already testing for code necessary to generate the newform: https://github.com/LMFDB/lmfdb/blob/master/lmfdb/classical_modular_forms/test_cmf2.py#L71-L115
However, we don't test this optional function.
Once we fix it, one can add a check for this function, but we still need to do this manually.

[assaferan]

Modified the function to have Kf as an optional parameter in pull request #6343