Fix some unclosed links

[Rageking8]

Unclosed link fixes and metadata changes are in the first commit, while cleanups and updates are split into multiple other ones to keep things clean. Hence, it's better to review one commit at a time.

Updates (for second commit onwards):

• Replace br elements with escapes
• Add cpp as language to code blocks
• Format code snippet content

[prmerger-automator]

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

[learn-build-service-prod]

Learn Build status updates of commit a664524:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/atl/atl-utilities-reference.md	✅Succeeded
docs/atl/reference/ccommultithreadmodel-class.md	✅Succeeded
docs/cppcx/platform-guid-value-class.md	✅Succeeded
docs/data/odbc/odbc-and-mfc.md	✅Succeeded
docs/mfc/reference/diagnostic-services.md	✅Succeeded
docs/parallel/concrt/reference/invalid-scheduler-policy-thread-specification-class.md	✅Succeeded
docs/parallel/concrt/reference/invalid-scheduler-policy-value-class.md	✅Succeeded
docs/standard-library/output-file-stream-member-functions.md	✅Succeeded

For more details, please refer to the build report.

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[Rageking8]

Drive-by fix where invalid_scheduler_policy_thread_specification and invalid_scheduler_policy_value were mixed up.

[ttorble]

@TylerMSFT

Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

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

[TylerMSFT]

This is great - thank you! This will also help with the broken link report, so double thank you.

[TylerMSFT]

#sign-off

[prmerger-automator]

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