lint -fix a manifest with variable enclosed in {}  ends up deleting the whole manifest

## Describe the Bug
having a line like
`${bug} = 42`
in a manifest and running 
`puppet-lint -fix `
ends in deleting all code in the manifest/file.

## Expected Behavior
not deleting the code I have written

## Steps to Reproduce
see description

## Environment
Either:
VoxBox image 104434a1c18b (running lint_fix)
or
debian trixie puppet-lint package 4.3.0-1 (running puppet-lint -f)
