HALIFAX – If you thought Bragg Communications, parent company of EastLink, was content with being the dominant cable operator in Nova Scotia and Prince Edward Island – not to mention a painful, persistent competitive thorn in Bell Aliant’s side, you’d be wrong. On Friday, Bragg more than doubled its size by announcing it has signed a purchase agreement with Persona Communications. The combined company – when you add in its impending purchase of Amtelecom – will have close to half a million basic cable subscribers (260,000 from Persona added to EastLink’s approximate 230,000).The agreement to purchase the shares of Persona...