wxString cmd(" diff " + file);
wxString cmd(" -z6 diff " + file);
    void CVSRunner::Diff(const wxString& target)    {        SetCommand(wxString("CVS-diff"));        SetTarget(target);        wxFileName fn(target);        wxString file = Q(fn.GetFullName());        wxString cmd(" diff " + file);        Run(cmd, fn.GetPath(wxPATH_GET_VOLUME));    };