jawk
-o=csv
--select=.=value
--select=&index=index
--select=&index-in-file=index in file
--select=&started-at-line-number=from-line
--select=&ended-at-line-number=end-line
--select=&started-at-char-number=start-char
--select=&ended-at-char-number=endchar
--select=&file-name=file
tests/integration/examples/23/file1.txt
tests/integration/examples/23/file2.txt
--order-by=&file-name