Changes to fit coefficient outputs

[leek2]

1. Can we reverse the order of the polynomial that is put out? Currently it lists Ax^4 + Bx^3 + Cx^2 + Dx + F. This always seems backward to us. Can we instead see F + Dx + Cx^2 + Bx^3 + Ax^4?

2. Can we just see a number, rather than the value written as an exponent? For example, we would prefer 0.0678 rather than 6.78E-2. (For small numbers. Obviously for 3e100 this isn't going to work. We may need an if to deal with this. Python naturally does this (see here https://datagy.io/python-scientific-notation/) but not when formatting. And we need formatting to force item 3 I think.

3. Have Curvallis give a fit with more decimal points? At least 8.

Thanks,