Convert tabs in given files (or standard input, if the file is given as -) to the appropriate number of spaces; write results to standard output.
Print help message and then exit.
Convert tabs only at the beginning of lines.
tabs is a comma-separated list of integers that specify tab stops. With one integer, the tab stops are set to every integer spaces. By default, tab stops are eight spaces apart. With -t and --tabs, the list may be separated by whitespace instead of commas.
Print version information and then exit.