extensions/markdown-language-features/src/languageFeatures/references.ts/MdReferencesProvider/looksLikeLinkToDoc
class MdReferencesProvider:	private looksLikeLinkToDoc(href: InternalHref, targetDoc: vscode.Uri) {
		return href.path.fsPath === targetDoc.fsPath
			|| uri.Utils.extname(href.path) === '' && href.path.with({ path: href.path.path + '.md' }).fsPath === targetDoc.fsPath;
	}