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["日付","整数","少数","文字列"]
["2020-12-01",1,0.01,"スペースは ある"]
["2020-12-02",12,0.12,"ダブルクォート(\")もある"]
["2020-12-03",123,1.23,"改行\nあり"]
["2020-12-04",1234,12.34,"折り返されているだけの行も当然ある"]
["2020-12-05",12345,123.45]
["2020-12-06",123456,1234.56,"↑入ってない行もある"]
["2020-12-07",1234567,12345.67,"0123"]
["2020-12-08",12345678,1234567.8899999999,"↑数値だけという事もあるけど"]
["2020-12-09",123456789,12345678,"⑳㉚㎥𩸽"]
["2020-12-10",1234567890,12345678.9,"↑SJIS範囲外は無視して良い"]