- test_customization_notes_render_as_aside now asserts the four NOTE
bullets live inside the <Aside> tags, not merely anywhere on the
page — a re-wrapped bullet previously still passed because the
bullet text leaked into an untouched sibling paragraph.
- TREE_BRANCH_RE no longer matches an indented/continuation branch
line (dropped the leading `[│ ]*`), so a second-level tree falls
through to verbatim rendering instead of being silently flattened
to one level. Added test_as_file_tree_rejects_deeper_trees to guard it.
rootiest
