Fix `FromFile` prior repr.
Closes https://git.ligo.org/lscsoft/bilby/-/issues/503
This MR fixes a long-standing bug in the FromFile
class. Basically, the repr
method requires having all of the instantiation arguments stored as attributes with the same name. For some reason, we have file_name
in the declaration and the same argument stored as id
. This MR just makes that consistent.