| ⇢ | A | SlugNormalizer added | |
| ⇢ | A | TextNormalizer added | |
| A | ↛ | DefaultSlugGenerator removed | 
| ⇢ | A | TextNormalizer::normalize() added | |
| ⇢ | A | HeadingPermalinkProcessor::useNormalizerFromConfig... added | |
| ⇢ | A | SlugNormalizer::normalize() added | |
| ⇢ | A | ReferenceMap::__construct() added | |
| ⇢ | A | AnonymousFootnoteRefParser::__construct() added | |
| A | ↛ | DefaultSlugGenerator::getChildText() removed | |
| A | ↛ | HeadingPermalinkProcessor::useSlugGeneratorFromCon... removed | |
| A | ↛ | DefaultSlugGenerator::slugifyText() removed | |
| A | ↛ | DefaultSlugGenerator::generateSlug() removed |