That's the one. My (mild) complaint is that unlike most command line filter programs,

(a) it breaks if you put the -t and -e switches in the wrong place (like before the input file)
(b) it doesn't allow a second file name for output, other than using the > symbol to redirect output.
(c) Error messages go to standard output, not stderr, so your output file contains the error message and you don't see it immediately on the screen.

Anahata