itab.icn: Program to entab an Icon program

itab -- Entab an Icon program, leaving quoted strings alone.

     itab [options] [source-program...]

     options:
             -i      Input tab spacing (default 8)
             -o      Outut tab spacing (default 8)

Observes Icon Programming Language conventions for escapes and
continuations in string constants.  If no source-program names are
given, standard input is "itabbed" to standard output.