Function batch.Split() splits on wrong separator

[flaviopicci]

Describe the bug
Function batch.Split(sqlString, "GO") wrongly splits the sqlString on all go occourrecnces, even if it's part of a statement, like goto or columns identifiers, like gone.

To Reproduce
Call batch.Split(sqlString, "GO") with an sqlString that has goXXX as identifier on an newline.
E.g.:

sqlString = `
select 1
go
select
  gone_ts
from t
go`

statements := batch.Split(sqlString, "GO")
// statements = ["\nselect 1\n", "\nselect\n  ", "ne_ts\nfrom t\n"]

Expected behavior
I would expect statements from above to be

// statements = ["\nselect 1\n", "\nselect\n  gone_ts\nfrom t\n"]

Further technical details

go-mssqldb version: 1.8.0
SQL Server version: N/A
Operating system: N/A