How can I prevent JuliaFormatter from creating new lines after =?

[nathanaelbosch]

Example: I have the following code, which fits into the specified width:

R = isnothing(alg.pn_observation_noise) ? nothing :
      to_factorized_matrix(FAC, cov2psdmatrix(alg.pn_observation_noise; d))

I also use join_lines_based_on_source = true. But when I run JuliaFormatter, I get

R =
    isnothing(alg.pn_observation_noise) ? nothing :
    to_factorized_matrix(FAC, cov2psdmatrix(alg.pn_observation_noise; d))

With which setting can I prevet this from happening?

[domluna]

nothing currently except increasing the margin

[nathanaelbosch]

This is unfortunate. Maybe there is a way to add this to the join_lines_based_on_source option, so that no newlines are created when they don't need to? Just to prevent any confusion, my issue is the newline after the = that gets created even though all the lines are inside the margin. I'd be happy to contribute, I just don't really know where I should start looking.