CPP implementation: does not reference a required separator character

[fulldecent]

The C++ implementation states:

// Returns an Open Location Code with code_length significant digits. The string
// returned may be one character longer if it includes a separator character
// for formatting.

This is underspecified. Every plus code will have a separator character. CITATION NEEDED. Therefore a better wording would be to say:

// Returns an Open Location Code with code_length significant digits. The string
// returned will be one character longer because it includes a separator character
// for formatting.

[fulldecent]

Recommended tag: implementation

[fulldecent]

I realize this wording is CPP is based on a older and outdated understanding of OLC that used to be here. So this is issue should still be fixed.