\varphi and \phi are switched

In the code editor, \varphi gives ϕ and \phi gives φ. In LaTeX however, it is the opposite, eg. \phi gives ϕ and \varphi gives φ. This can be kind of annoying when plotting, since the phi symbol in the code and the plot are different.

I would suggest switching \varphi to give φ in the editor and \phi to give ϕ, to be consistent with LaTeX notation.