Convert tabs in given files (or standard input, if the file is named -) to appropriate number of spaces; write results to standard output.
-tabs, -t tabs, --tabstabs
tabs is a comma-separated list of integers that specify the placement of tab stops. If exactly one integer is provided, 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.