mutable struct in docstrings

[ArnoStrouwen]

I'm trying to format the docstrings to SciML style.
The "mutable struct" here messes up the formatter.
https://docs.sciml.ai/DiffEqNoiseProcess/stable/abstract_noise_processes/#DiffEqNoiseProcess.NoiseProcess

Remove it like https://docs.sciml.ai/DiffEqDocs/stable/types/ode_types/#SciMLBase.ODEFunction ?