Use MACROs for various aspects of data presentation

[yarikoptic]

I spotted

that is where MACROS___make_filetree_example should be used. See examples throughout specification, e.g. in https://raw.githubusercontent.com/bids-standard/bids-specification/373da35afb81b11a2e6cbfe2f4e00c883d5fb220/src/common-principles.md or even down below in the same document