SAN FRANCISCO (Standard&Poor's) Oct. 23, 2015--Standard&Poor's Ratings Services revised the outlook to stable from positive and affirmed its 'AA-' long-term rating and underlying rating (SPUR) on Los Angeles, Calif.'s general obligation (GO) bonds and its 'A+' long-term rating and SPUR on the city's appropriation-backed debt outstanding. At the same time, Standard&Poor's assigned its 'A+' rating to Municipal Improvement Corp. of Los Angeles, Calif.'s series 2015-A taxable refunding lease revenue bonds, issued for the city. "The stable outlook reflects our view of the uncertainty surrounding significant pending litigation, particularly regarding the class action lawsuits challenging the validity of the city's power revenue fund transfers," said Standard&Poor's credit analyst Jen Hansen. "The transfers are