The set union infix operator shares the `|` symbol with comprehensions,
creating edge-cases where the formatter would change the semantics of a
set union into a comprehension.
E.g. When formatted, `{or(a, b)}` becomes `{a | b}`; where the former is
a set containing the union of two sets, and the latter is a set
comprehension.
Note: the `or()` built-in backing the `|` set union infix operator isn't
advertised through documentation, and it's very unlikely that anyone is
affected by this issue. Nevertheless, formatting shouldn't change the
semantics of a policy.
Signed-off-by: Johan Fylling <johan.dev@fylling.se>
Johan Fylling
6a5a0c2570