Function getDiff

static/editor.md/lib/codemirror/addon/merge/merge.js:549–563

(a, b)

  var dmp = new diff_match_patch();
  function getDiff(a, b) {
    var diff = dmp.diff_main(a, b);
    dmp.diff_cleanupSemantic(diff);
    // The library sometimes leaves in empty parts, which confuse the algorithm
    for (var i = 0; i < diff.length; ++i) {
      var part = diff[i];
      if (!part[1]) {
        diff.splice(i--, 1);
      } else if (i && diff[i - 1][0] == part[0]) {
        diff.splice(i--, 1);
        diff[i][1] += part[1];
      }
    }
    return diff;
  }

  function getChunks(diff) {
    var chunks = [];