Baltimore City Paper — the free alternative weekly that has provided news, music and arts information for 40 years — will be closed this year by its owner, Baltimore Sun Media Group, the City Paper reported on its website earlier this month. But City Paper Editor Brandon Soderberg isn't ready to give up on the paper's future. He used the paper's story of the closure to ask potential buyers to save the weekly paper. Baltimore Sun Media Group spokeswoman Renee Mutchnik cited de