| A | ↘ | D | CheckTree got worse |
| ⇢ | A | CheckTree::recordType() added | |
| ⇢ | A | CheckTree::recordError() added | |
| ⇢ | A | CheckTree::recordLink() added | |
| ⇢ | A | CheckTree::__construct() added | |
| ⇢ | A | CheckTree::lineError() added | |
| ⇢ | A | CheckTree::linkErrorMessage() added | |
| A | ↛ | CheckTree::checkLinkMessage() removed | |
| A | ↛ | CheckTree::checkReverseLink() removed | |
| A | ↛ | CheckTree::formatType() removed | |
| A | ↛ | CheckTree::checkLink() removed |