Fix handling of `stateSep` in batch package. Addresses bug #247#248

flaviopicci wants to merge 1 commit intomicrosoft:mainmicrosoft/go-mssqldb:mainfrom

flaviopicci:bugfix/247-batch-split-splits-on-wrong-separatorflaviopicci/go-mssqldb:bugfix/247-batch-split-splits-on-wrong-separatorCopy head branch name to clipboard