i:   "class main {}"
o: "[[class main {}]]"
i:   "import bla.*; class main {}"
o: "import bla.*; [[class main {}]]"
i:   "class main { String bla; }"
o: "[[class main { String bla; }]]"
i:   "class main { String bla; }\n"
o: "[[class main { String bla; }]]\n"