When used with - t , use the minimum number of lines to write the output. If gap is 0 or is omitted, it defaults to 8 . If any non-digit character, char , is specified, it will be used as the input tab character. Pause before beginning the first page if the standard output is associated with a terminal. Standard output will be formatted so pr writes one line from each file specified by file , side by side into text columns of equal fixed widths, in terms of the number of column positions.
Implementations support merging of at least nine file s.
The number will occupy the first width column positions of each text column of default output or each line of - m output. If the - o option is not specified, the default offset is 0 . Quit writing after the last line of each file without spacing to the end of the page. For single column output, input lines will not be truncated. If gap is 0 or is omitted, default TAB settings at every eighth column position are assumed.