NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed its ratings on Sunoco, LP (SUN) and Sunoco Finance Corp. following the announcement that SUN will be acquiring Susser Holdings Corp. (Susser) from its sponsor Energy Transfer Partners, LP (ETP; 'BBB-'/Outlook Stable). Fitch has also assigned a rating of 'BB/RR4' to SUN's $500 million senior unsecured notes offering due 2020. Proceeds from the notes are expected to fund a portion of the cash consideration for the Susser acquisition. The notes