| ⇢ | A | MarkdownConverter added |
| ⇢ | A | EmphasisDelimiterProcessor::enableStrong() added | |
| ⇢ | A | EmphasisDelimiterProcessor::enableEm() added | |
| ⇢ | A | RegexHelper::matchFirst() added | |
| ⇢ | A | MentionExtension::isAValidPartialRegex() added | |
| ⇢ | A | MarkdownConverter::__construct() added | |
| ⇢ | A | MarkdownConverter::getEnvironment() added | |
| ⇢ | A | Configuration::exists() added | |
| A | ↘ | B | CommonMarkCoreExtension::register() got worse |
| A | ↛ | CommonMarkConverter::getEnvironment() removed |