Introducing ExtefsionSets,,,,,,,,,,,,,,. FencedCodeBlock is considered an extension, but existing usage of markdownToHtml() and new Document() use default extension set, which is ExtensionSet.commonMark, which includes FencedCodeBlock.
Introduce ExtensionSets. FencedCodeBlock is considered an extension, but existing usage of markdownToHtml() and new Document() will use the default extension set, which is ExtensionSet.commonMark, which includes FencedCodeBlock.