/usr/lib/swipl/library/ext/libedit/editline.pl
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 el_wrap(+ProgName:atom, +In:stream, +Out:stream, +Error:stream) is det
Enable editline on the stream-triple <In,Out,Error>. From this moment on In is a handle to the command line editor.
Arguments:
ProgName- is the name of the invoking program, used when reading the editrc(5) file to determine which settings to use.