Original sentence: Ivo Banac maintains that during the Middle ages Torlak and Eastern Herzegovinian dialects were Eastern South Slavic, but since the 12th century, the Shtokavian dialects, including Eastern Herzegovinian, began to separate themselves from the other neighbouring Eastern dialects, countint also Torlakian
Edited sentence: Ivo Banac maintains that during the Middle ages Torlak and Eastern Herzegovinian dialects were undoubtedly Eastern South Slavic, but since the 12th century, the Shtokavian dialects, including Eastern Herzegovinian, began to separate themselves from the other neighbouring Slavic dialects