Indent if and else in multiline ternary statements

[uycire]

Operating system: macOS Mojave
Python version: 3.7.0
Black version: 18.6b4
Does also happen on master: Yes

When I write a multi-line ternary statement in a dictionary, Black formats the if and else with the same indentation as the dictionary key.

print(
    {
        "ternary": "condition is true"
        if 1 + 1 == 2 and 2 + 2 == 4 and 4 + 4 == 8
        else "condition is false"
    }
)

I expected the if and else to be more indented, like this:

print(
    {
        "ternary": (
            "condition is true"
            if 1 + 1 == 2 and 2 + 2 == 4 and 4 + 4 == 8
            else "condition is false"
        )
    }
)

[ambv]

This is essentially a subset of #620. Let's tackle that one instead.