At first I thought, “but a single-element collection should always fit,
right?” And sure it fits, but then I reformatted a larger experimental
config I have, including some GitHub Actions, and it turns out that
sometimes I prefer even single-element litst to be tall. Black is right
about this. I should be less opinionated, leave it to the user.
This gives users a bit more control over whether things get formatted
wide or tall. This matters in practice, as Black learned the hard way,
and I did as well in the GitHub Actions example.
In the past I did not autoformat them because I was not happy with the
output yet, but now the formatter is good enough that I'm willing to
take this. There are still a few cases where I'm like ... meh, but that
requires human judgement that I think a formatter can never get right,
so I'm willing to stop arguing about this to get a formatter.
Possibly in the future I can add the magic trailing comma like Black has
in Python, to force collections to be tall. That could still be nice.
We can do that in a follow-up.
I am still ambivalent about this. On the one hand I have a strong sense
that "key = value;" is a statement that needs a terminator. On the other
hand, it makes things more uniform to have only a single separator.
I think I just need to get used to the comma, and then I will not mind
so much. But let's see.
