Wrong result of JsDiff.diffLines when there is an empty line before a change

[felicienfrancois]

var oldStr = "Line1\n" + "\n" + "Line2\n";
var newStr = "Line1\n" + "\n" + "ChangedLine\n";
JsDiff.diffLines(oldStr, newStr);

outputs

[
  {
    "count": 1, // Should be 2
    "value": "Line1\r\n" // Should be "Line1\n\n"
  },
  {
    "count": 1,
    "added": true,
    "value": "ChangedLine\n"
  },
  {
    "count": 1,
    "removed": true,
    "value": "Line2\n"
  }
]

In fact it seems successive \n are replaced by \r and ignored in counts

[kpdecker]

Closing in favor of #52