doc/api: module syncBuiltinESMExports example fix

[bmacnaughton]

Fix failing code and add explanations of each assert.

Checklist

• documentation is changed or added
• commit message follows commit guidelines

Fix incorrect assert expectations, add explanation of what each assert is verifying.
Define assert so the example is self-contained.

[guybedford]

Thanks @bmacnaughton for fixing this up!

[bmacnaughton]

Is there something I need to do in order to fix the failing checks? I see no errors in the output (and the example code in docs doesn't get executed afaict).

Also, if there is any feedback for me regarding how I can improve PRs let me know. I'm a novice.

[guybedford]

The failure just seems to be some flakey tests on the GitHub CI process. No need to fix anything.

[aduh95]

@bmacnaughton can you rebase to resolve the conflicts please?

[github-actions]

This issue/PR was marked as stalled, it will be automatically closed in 30 days. If it should remain open, please leave a comment explaining why it should remain open.

[github-actions]

Closing this because it has stalled. Feel free to reopen if this PR is still relevant, or to ping the collaborator who labelled it stalled if you have any questions.

[guybedford]

Reopening as this is a valid docs bug we should fix.

[guybedford]

The diff here is exactly the same but against the module.md file insted of the modules.md file.

[aduh95]

Landed in 28e9c10