lsym_if
case lsym_if: ps.spaced_expr_psym = psym_if_expr; goto copy_token;
if (lsym == lsym_if && ps.prev_lsym == lsym_else
if (ps.newline == nl_unless_if && lsym != lsym_if)
|| ps.prev_lsym == lsym_if
{"if", lsym_if},