lpeg.C append tab character to capture

[Philippe Rathé <prathe@...>]

Hello lpeg folks,

Is lpeg.C suppose to append a tab after a match?

    local word = lpeg.C'wo' *  lpeg.C'rd'
    print(word:match('word'))

    wo\trd

Note that \t is the tab character (ascii 09).
How can I get rid of it?
Thanks.
-- 
-- Philippe