command/format: Reduce extra whitespaces & new lines

[radeksimko]

The original goal was to reduce newlines between each output in terraform show, as demonstrated in one of the tests cases, but I also found one extra trailing whitespace printing for untainted (most) resources.

[mildwonkey]

Off topic, but since you are in there, what do you think about reducing the newlines between resources and outputs? There are currently 3 and I think it looks awkward:

resource "random_pet" "my_pet" {
    id        = "main-fox"
    length    = 2
    separator = "-"
}


Outputs:```

(since this doesn't directly relate feel free to ignore this!)

[radeksimko]

@mildwonkey Sure, are 2 lines ok, or would you go as far as 1 empty line?

I'm slightly more inclined to keeping it at 2 as we use 1 line for separating resources and this is whole new section, so the separation should be a bit more prominent, IMO?

[wyardley]

Does this / could this also fix #14858, which has been open for 2 years (!!!) to remove a single extra newline after terraform --version output?

[pselle]

Read through this a few times, and looks good to me! Looks like prior comments are related to making an additional change, and this PR already does a couple extra hoops (although, do have at, if you want to do the 3=>2 change)

[ghost]

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