Update high-scores.test

Programming Tcl
1

Test high-scores-1.3 added: List of scores, repeated addition. The purpose is to check if scores are added and not replaced.

# track test
#skip high-scores-1.3
test high-scores-1.3 {List of scores, repeated addition} -setup {
    set hs [HighScores new]
} -body {
    $hs addScores 30 50
    $hs addScores 20 70
    $hs scores
} -returnCodes ok -result {30 50 20 70}