cleanup, docs

site/doc/pages/file_append.txt

@@ -12,7 +12,6 @@ file_name : file name of file that should be written to
 Opens or creates a file and appends data to it.
 
 The append transparently takes an exclusive file lock for the duration of the append operation. Concurrent writers are serialized, and `file_get_contents()` waits for in-progress writes to finish; callers do not manage locks manually.
-## Related Concepts
 
-- PHP: `file_put_contents($file, $data, FILE_APPEND)`
-- JavaScript / Node.js: Node `fs.appendFileSync()` or `fs.promises.appendFile()`
+:example
+print("file_append example\n");