Formatter breaks postgres @@ syntax

[cdalexndr]

Describe the bug Formatting sql with postgres operator @@ adds a space between resulting in invalid sql @ @.

To Reproduce Steps to reproduce the behavior:

1. Format lexeme @@ plainto_tsquery('en', 'keyword')
2. Result invalid: lexeme @ @ plainto_tsquery('en', 'keyword')

Expected behavior lexeme @@ plainto_tsquery('en', 'keyword')

Desktop (please complete the following information):

• SQLTools Version 0.23.0
• VSCode Version: 1.56.0
• OS: Windows
• Driver:
  • [ ] PostgreSQL/Redshift
  • [ ] MySQL/MariaDB
  • [ ] MSSQL/Azure
  • [ ] SQLite
  • [ ] Other? Which...
• Database version: [e.g. MySQL v5.6, PostgreSQL vX...]