Supporters of Proposition 8, the proposed state constitutional amendment that would ban gay marriage, said they would file suit today to block a change made by California Atty. Gen. Jerry Brown to the language of the measure's ballot title and summary. Petitions circulated to qualify the initiative for the ballot said the measure would amend the state Constitution "to provide that only marriage between a man and a woman is valid or recognized in California." In a move made public last week and applauded by same-sex marriage proponents, the attorney general's office changed the language to say that Proposition 8...