cleanup, docs

site/doc/pages/split_utf8.txt

@@ -22,7 +22,7 @@ If `compound_characters` is `true`, `split_utf8()` also applies a small amount o
 
 This is useful when simple byte-wise or ASCII splitting would break Unicode text incorrectly.
 
-Related:
 
-- PHP: `preg_split(//u, ...)`, `mb_*` helpers, or grapheme-aware libraries
-- JavaScript / Node.js: `Array.from(str)` or iterator-based Unicode-aware splitting
+:example
+StringList chars = split_utf8("Hi");
+print(join(chars, ","), "\n");