Beautifier don't process global variables correctly

[ClintWeaver]

Describe the bug
When running the Beautifer on a script with a global variable (@@ServerName for example), the Beautifer splits the two @ symbols (@ @ServerName), breaking the variable.

To Reproduce
Write a script that uses a global and run the Beautifer

Expected behavior
The @ symbols in global variables should not be split

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• SQLTools Version: 0.19.7
• VSCode Version:1.36.1
• Dialect Used/Version: Any MSSQL
• OS: Windows