When adding brackets via CTRL+B,CTRL+B, Windows-based principals (users, groups, etc.) are not correctly bracketed. The brackets are placed around the domain or computer name portion of the principal, instead of the combination of the domain/computer and user/group name.

For example, if this statement is entered

ALTER SERVER ROLE sysadmin ADD MEMBER MYDOMAIN\USER

using CTRL+B,CTRL+B will yield this:

ALTER SERVER ROLE [sysadmin] ADD MEMBER [MYDOMAIN]\USER

instead of the correct syntax:

ALTER SERVER ROLE [sysadmin] ADD MEMBER [MYDOMAIN\USER]

Would also be helpful if principals from NT AUTHORITY and NT SERVICE could be correctly handled.