c__prev_word
protected wchar_t *c__prev_word(wchar_t *, wchar_t *, int, int (*)(wint_t));
cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
el->el_line.cursor = c__prev_word(el->el_line.cursor,
cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,