/*!
 * Change
 * This is used for comparing two lines.
 *
 * @name Change
 * @function
 * @param {String} oldLine The old line value.
 * @param {String} addedLine The new line.
 * @param {Number} sensitivity The diff sensitivity.
 * @return {Change} The `Change` object:
 *
 *  - `_` (Array): An array with the old line and the new line.
 *  - `changes` (Number): How many changes are there, calculated with the levenshtein distance algorithm.
 *  - `modified` (Boolean): A boolean value representing if the old line was modified or not.
 */