Use proper en dash approximation for console report output

Both TestSetStats and WrappedReportEntry use either a hypen-minus or two spaces two add a pause between two partial sentences/clauses. The proper typographical character for the English language is en dash (U+2013). Though, we could directly print the Unicode character we cannot assume that all terminals can/will display it properly, therefore we will print the approximation with two consecutive hyphen-minuses: https://en.wikipedia.org/wiki/Dash#Approximating_the_em_dash_with_two_or_three_hyphens