fold - fold long lines
fold [-n] [file] ...
-n How long should the output lines be
fold -60 # Fold stdin to 60 characters
fold file # Fold file to 80 characters
Fold takes copies its input from the named file (or stdin, if none is
specified) to standard output. However, lines longer than the given
maximum (default 80) are broken into multiple lines of the maximum length
by inserting new line characters.
width(1).