styling

Can you review the styling of those files ?

Styling issues are reported in a "style" gitlab job (that I'll move to a common part), it displays this kind of info: https://gitlab.cern.ch/apc/experiments/ntof/ntoflib/-/jobs/5420180

All the tools (code completion, styling) are available in a dedicated docker container, I'll write some docs on how to setup a convenient build environment.