TREASURIES-U.S. yields fall before non-farm payrolls report

* U.S. jobless claims fall, briefly lift yields * Focus on non-farm payrolls for April * U.S. yield curve steepens for 5th day * U.S. 5-year breakeven inflation backs off 10-year high (Adds new analyst comments, updates prices) By Gertrude Chavez-Dreyfuss NEW YORK, May 6 (Reuters) - U.S. Treasury yields weakened on Thursday in a choppy session, moving within narrow ranges, as investors largely shrugged off better-than-expected initial jobless claims data and instead looked ahead to Friday's key non-farm payrolls report. U.S. payrolls will likely confirm the economy's solid path to recovery from the pandemic, analysts said. Economists expect 978,000 new U.S. jobs for April, according to a Reuters poll. Analysts said whisper numbers suggested that Friday's report could show a rise of more than one million jobs. The yield curve, meanwhile, flattened for a fifth straight day, as yields on the long end stalled amid increased investor demand with the Federal Reserve repeatedly affirming its