I've found a bug in the MinificationHelper.IsMinified(string content) Proplem occurs if the checked content is minified to one single row. If the content is really minimized, it shouldn't contain '\n' at all, so the variable lines might get the value of 0 (zero). This will throw exception when trying to divide totalCharachters by zero

public bool IsMinified(string content)
    {
        var totalCharacters = content.Length;
        var lines = content.Count(x => x == '\n');
        var ratio = totalCharacters / lines;          // ratio characters per line
        return ratio < 200;
    }