int c0 = ln == l0 ? loc->start.column : 1;
int c1 = ln == l1 ? loc->end.column : ss_utf8_count_columns (line);
int c0 = ln == l0 ? loc->start.column : 1;
int c1 = ln == l1 ? loc->end.column : ss_utf8_count_columns (line);
{
ds_put_cstr (&s, "\n |");
ds_put_byte_multiple (&s, ' ', c0);
{
ds_put_cstr (&s, "\n |");
ds_put_byte_multiple (&s, ' ', c0);