The title of the fmt man page in v9 was "ultra-simple text formatter". Gnu dropped the "ultra" in favor of AI. Sometimes it does a pretty job. Sometimes it messes up my typing style. Always it produces a an apparently wavering right margin, as it assigns a separate "optimal" line length to each paragraph. It's hard to imagine how this command could stray from classic Unix simplicity and intelligibility, but Gnu pulled it off. Doug