| ⇢ | A | StringOrFileList added | 
| ⇢ | B | StringOrFileList::__construct() added | |
| ⇢ | A | StringOrFileList::offsetGet() added | |
| ⇢ | A | StringOrFileList::offsetExists() added | |
| ⇢ | A | StringOrFileList::offsetSet() added | |
| ⇢ | A | StringOrFileList::offsetUnset() added | |
| B | ↘ | C | MathielenImportEngineExtension::addStorageProvider... got worse |