Method: Process changed lines to do word-by-word diffs for extra highlighting.

Method: Takes changed blocks and matches which rows in orig turned into which rows in final.

Method: Computes a number that is intended to reflect the “distance” between two strings.

Method: Make private properties readable for backward compatibility.

Method: Make private properties settable for backward compatibility.

Method: Make private properties checkable for backward compatibility.

Method: Make private properties un-settable for backward compatibility.

Method: Constructor – Call parent constructor with params array.