Empty comment at end of file gets mis-formatted

[DavidS-ovm]

Describe the bug

Files with an empty comment at the end get mis-formatted.

To Reproduce
Steps to reproduce the behavior:

1. Create a SQL file with the following contents:

   --foo
   --
   

2. Format Document twice
3. File contents will now be

   --foo
   - -
   

4. Sadness

Expected behavior
The last comment is preserved without the additional space

Screenshots

Desktop (please complete the following information):

• SQLTools Version: v0.28.0
• VS Code Version: 1.80.2
• OS: Debian
• Driver:
  • PostgreSQL/Redshift
• Database version: postgres:14.6-alpine

Additional context
Setting files.insertFinalNewline to true works around the issue.