Undocumented in source.

auto helpText = q"EOS Synopsis: number-lines [options] [file...] number-lines reads from files or standard input and writes each line to standard output preceded by a line number. It is a simplified version of the unix 'nl' program. It supports one feature 'nl' does not: the ability to treat the first line of files as a header. This is useful when working with tab-separated-value files. If header processing used, a header line is written for the first file, and the header lines are dropped from any subsequent files. Examples: number-lines myfile.txt cat myfile.txt | number-lines --header linenum number-lines *.txt Options: EOS";