Before change
```
⇶  packer fmt -check /tmp/unformatted.pkrvars.hcl
Error: Cannot tell whether /tmp/unformatted.pkrvars.hcl contains HCL2 configuration data

⇶  echo $?
1
```

After fix
```
⇶  packer fmt -check /tmp/unformatted.pkrvars.hcl
/tmp/unformatted.pkrvars.hcl

⇶  echo $?
3

⇶  packer fmt -check command/test-fixtures/fmt
command/test-fixtures/fmt/unformatted.pkr.hcl
command/test-fixtures/fmt/unformatted.auto.pkrvars.hcl
command/test-fixtures/fmt/unformatted.pkrvars.hcl

```