cleanup, docs

site/doc/pages/cwd_set.txt

@@ -11,4 +11,7 @@ path : the new working directory
 Sets the host worker process current directory. In wasm this is a hostcall, so restore the previous directory when using it inside request code.
 
 :example
-print("cwd_set example\n");
+String old = cwd_get();
+cwd_set("/tmp");
+print("cwd is now ", cwd_get(), "\n");
+cwd_set(old);