set flag tok_javaCallsToLeftArrowStyle_debug.

svoid test_tok_javaCallsToLeftArrowStyle() {
  print(javaCallsToLeftArrowStyle([[
  points <- ll (pair(doublePt(10, 10), color("#FF0000")),
    pair(doublePt(70, 150), color("#FFFF00")),
    pair(doublePt(224, 300), color("#FF0000")),
    pair(doublePt(121, 100), color("#00FFFF")),
    pair(doublePt(160, 10), color("#FF00FF")))
  ]]));
}