reverse engineer `savename`

[Datseris]

It would be nice to have a function that attempts to reverse engineer a string that is the output of savename. This function would always return prefix, params, suffix with prefix, suffix being strings (if non found then the empty strings) and params always a Dict with String keys (arbitrary choice).

To make this function is easy: first split by the connector argument (by default _), then identify prefix, suffix if any, and then find all the pairs connected by = and make them into the Dict.

[Datseris]

thanks to @sebastianpech