Formatting of single-line objects includes extra newlines

### HCL Template
```hcl
test1 = { key = "environment", value = "${terraform.env}" }

test2 = {
key = "environment",
value = "${terraform.env}",
}
```

### Expected behavior
Both objects are formatted the same.

### Actual behavior
```
$ hclfmt test.hcl
test1 = {
key = "environment"

value = "${terraform.env}"
}

test2 = {
key = "environment"
value = "${terraform.env}"
}
```

Start with the inline HCL examples and reproduce the result using the hclfmt test.hcl command shown in the issue. Trace the formatter behavior for single-line and multiline objects; done means both inputs receive consistent formatting without the extra blank line.

Written by the indexing model from the issue text.