[C++] Syntax highligting issue: initialisation lists

[DanielJamesCollier]

struct test {

    test(int x, int d, std::string dave) :
        _x(x),
        _d(d),
        _dave(dave)
    {

    }

    int _x;
    int _d;
    std::string _dave;
};

struct test2 {

    test2(int x, int d, std::string dave) :
        _x(x)
    ,   _d(d)
    ,   _dave(dave)
    {

    }

    int _x;
    int _d;
    std::string _dave;
};

I believe that github uses this repository for its syntax highlighter. Looking above, both pieces of code are the same but show different highlighting. test2 is the broken highlighted version