By Punch Shaw FORT WORTH -- Greek tragedy rubs elbows with Elizabethan comedy in the Condensed Shakespeare Festival: Toga Party Edition, an evening of three plays for the price of one offered by the Stolen Shakespeare Guild at the Fort Worth Community Arts Center.The first act is devoted to a sort of Reader's Digest version of the Bard's The Comedy of Errors, wherein this comedy of brotherly confusion set in ancient Greece is reduced to less than one hour.