remove equals sign from filename in add_spl_to_patients.py

[Vincent-Ustach]

I noticed that the script add_spl_to_patients.py generates filenames that include an equals sign (=).

SHEPHERD/data_prep/shortest_paths/add_spl_to_patients.py

Line 141 in e61281f

spl_matrix_fname = project_config.MY_DATA_DIR / f'{args.save_prefix}_agg={args.agg_type}_spl_matrix.npy'

'mydata_agg=mean_spl_matrix.npy'

While this is technically allowed, I recommend avoiding this character in filenames. There are a few reasons for this, such as cross-platform compatibility, shell and command line confusion, potential for automation conflicts, and readability.

Recommendation: Consider replacing the equals sign with a more neutral character, such as an underscore (_) or a dash (-).