PageTree Macro: Root / Title is always "@self" and cannot be modified

[DreadPirateShawn]

What happened?

The ac:pagetree macro implementation has a minor bug that prevents the Root / Title value from being modified.

What did you expect to happen?

Root / TItle value should be used when provided.

How can we reproduce the behavior you experienced?

<!-- Macro: :demo:
     Template: ac:pagetree
     Title '@home' -->

:demo:

Further Information (please complete the following information)

• Mark Version: mark version 11.3.0
• Mark Parameters: mark --config ~/.mark --space foo -f filename.md
• Confluence Hosting: Cloud
• Confluence Version: "latest", as of 2025.01 (cloud doesn't really expose this to us clearly)
• Environment specific Information: repro using brew version of mark on Mac OS

Logs or other output

n/a

Additional context

Related PR: #329
Buggy line of code: https://github.com/kovetskiy/mark/blob/c5d0a8b/stdlib/stdlib.go#L389