Black generates different line breaks for similarly structured codes

[inyeollee]

Black v20.8b1

Black inserts line breaks after parenthesis for 'foo == long_expression_with_parenthesis' as expected, but if I restructure the code as 'long_expression_with_parentheses == foo', then it wraps the whole expression with parenthesis, quite different from the original formatting.

Playground link

Options

--line-length=20
--safe

Input

assert foo == func(loooooooooong_args)
assert func(loooooooooong_args) == foo

Output

assert foo == func(
    loooooooooong_args
)
assert (
    func(
        loooooooooong_args
    )
    == foo
)

Expected

assert foo == func(
  loooooooooong_args
)
assert func(
  loooooooooong_args
) == foo