Also changed:
- options_mom_.vector_output to options_mom_.mom.vector_output
- optimizer_vec to options_mom_.optimizer_vec
- oo_.dr.obs_var to oo_.mom.obs_var
It is now supported by the MATLAB editor (as of R2022a).
The old ASCII notation is left in some files that we copy as-is from other
sources (e.g. in the contrib/ and m4/ subdirectories).
The particles submodule is not updated at this point, because it is in an
inconsistent state.
[skip ci]