cleanup, docs

site/doc/pages/mkdir.txt

@@ -13,7 +13,5 @@ Creates the directory named by `path`.
 
 The function returns `true` when the directory was created successfully.
 
-Related:
-
-- PHP: `mkdir()`
-- JavaScript / Node.js: Node `fs.mkdirSync()` or `fs.promises.mkdir()`
+:example
+print("mkdir example\n");