Merge code blocks for C2504

[Rageking8]

Merge both code blocks together as the second one does not have proper syntax highlighting and its slighter more terse this way. Also did some light formatting for the example and text.

[prmerger-automator]

@Rageking8 : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit ebfd8db:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/error-messages/compiler-errors-2/compiler-error-c2504.md	✅Succeeded

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[prmerger-automator]

PRMerger Results

Issue	Description
File Change Percent	This PR contains file(s) with more than 30% file change.

[Court72]

@TylerMSFT

Can you review the proposed changes?

When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[TylerMSFT]

@Rageking8, thank you for helping out with the docs.
This week I'm working to a deadline for some other content, so it'll be a week or so before I can look at these. Take care.

[TylerMSFT]

That's an improvement. Thank you.

[TylerMSFT]

#sign-off

[ShannonLeavitt]

Thanks @Rageking8