next_intuit_at
next_intuit_at(line_beginning, p_input_line);
next_intuit_at(0, 1L); /* start at the beginning */
next_intuit_at(beginning_of_this_line, p_input_line);
next_intuit_at(beginning_of_this_line, p_input_line);
next_intuit_at(line_beginning, p_input_line);
static void next_intuit_at(off_t, LINENUM);
next_intuit_at(line_beginning, p_input_line);