I usually try to organize related things in different files in the same 
order to ease code reviewing, reading and writing new code. For example: 
order of protocol method declarations, their definitions in records and 
unit tests. And I was wondering what's the best way to order keys in maps 
and specs.

The simple rule could be to always sort keys lexically, so that the order 
stays the same across files and there's no additional thinking needed when 
adding new keys.
But with `s/keys` it's not that simple since `:req`/`:req-un` can break the 
consistency across the files. E.g. during spec definition the correct 
lexical order is `:req-un [:a/x :a/y ::d]`, but during "usage" it will be 
different: `{:d ... :x ... :y ...}`.
The lesser drawback of this approach is that some human-friendliness is 
lost, e.g. keys `host, port, db, user, password` must be ordered as `db, 
host, password, port, user`.

Do you try to maintain the same order of map keys (including keys in specs) 
across the files? If yes, what rules do you follow?

Thank you.

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