pgspot error on valid plpgsql syntax

[jgpruitt]

pgspot dies reporting a syntax error on a file containing a return query execute <sql> using <var>; statement.

Here is a SQL script to reproduce the issue.

create schema repro;

create or replace function repro.this_dont_work(x int)
returns table(y int)
as $func$
declare
begin
    return query execute $$
    select y
    from generate_series(1, $1) y
    $$ using x;
end;
$func$ language plpgsql stable security invoker
set search_path to pg_catalog, pg_temp
;

As you can see below, postgres likes the code just fine:

But, pgspot dies on it:

pgspot repro.sql

 Errors: 0 Warnings: 0 Unknown: 0 
 syntax error at or near "$$
    select y
    from generate_series(1, $1) y
    $$", at index 0