{introspection}: grammar fixes.

[chris-ramon]

Details

• Closes: {introspection}: Grammar fixes. #726.
• introspection: grammar fixes.

Test Plan

✔️ Via unit tests & CI.

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[chris-ramon]

LGTM 👍 🚢

[mentatbot]

I noticed this PR was just merged, but I found a grammatical issue that was introduced:

The change from:

"If this server supports subscription, the type that ..."

to:

"If this server support subscription, the type that ..."  

is actually incorrect grammar. The subject "server" is singular, so it requires the third-person singular verb form "supports", not "support".

The original text was grammatically correct. This change makes the grammar worse, not better.

Since this is already merged, we should create a follow-up PR to fix this back to "supports subscription" to maintain proper grammar.

The other changes in the PR (adding the period to the enum description, fixing "a object" → "an object type definition", and cleaning up whitespace) were all good improvements.