Type.Is Nullable Type Rule Clarification

[bgribaudo]

Per https://learn.microsoft.com/en-us/powerquery-m/m-spec-types#type-equivalence-and-compatibility, this function's second parameter should only ever be a nullable primitive type.

This PR adds details about this requirement to the function's docs.

[prmerger-automator]

@bgribaudo : 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 30d1f95:

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[Court72]

@DougKlopfenstein

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

[DougKlopfenstein]

@bgribaudo, @ehrenMSFT - has this pull request reached a conclusion? Is it ready to be merged?

[ehrenMSFT]

@bgribaudo, @ehrenMSFT - has this pull request reached a conclusion? Is it ready to be merged?

My feedback above still applies.

[bgribaudo]

@DougKlopfenstein, thanks for checking up on this. This is blocked by #203. (That PR renames a term in the language spec which can then be used here to resolve @ehrenMSFT's feedback.)

[learn-build-service-prod]

Learn Build status updates of commit a4eb363:

✅ Validation status: passed

File	Status	Preview URL	Details
query-languages/m/type-is.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

[learn-build-service-prod]

Learn Build status updates of commit e23d11c:

✅ Validation status: passed

File	Status	Preview URL	Details
query-languages/m/type-is.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

[bgribaudo]

@DougKlopfenstein, given Ehren's approval, was there anything else needed from me on this?

[DougKlopfenstein]

Looks OK. Merging.

[bgribaudo]

Thank you, @DougKlopfenstein!