cleanup, docs

site/doc/pages/shell_escape.txt

@@ -13,7 +13,5 @@ Escapes a parameter so it can be used more safely with `shell_exec()`.
 
 This is the helper to reach for when building shell command lines from dynamic input.
 
-Related:
-
-- PHP: `escapeshellarg()` and `escapeshellcmd()`
-- JavaScript / Node.js: there is no direct built-in equivalent; prefer `spawn()` argument arrays and avoid shell interpolation
+:example
+print("shell_escape example\n");