clarified signature: avoid confusion due to redundant standard_path, which is already used here (but not elsewhere);

clarified signature: avoid case class with redefined equality;

discontinued somewhat pointless dependency: avoid illusion of extra accuracy (see also 09fb749d1a1e and 0f750a6dc754);

tuned;

clarified signature;

unused;

clarified signature;

tuned whitespace;

tuned;

clarified signature;