[http-client-csharp] spector case project `http/special-words` cannot compile

[ArcturusZhang]

In the spector test cases, we are generating code with some xml doc issues:

        /// <summary> withCancellationToken. </summary>
        /// <param name="cancellationToken"></param>
        /// <param name="cancellationToken"> The cancellation token that can be used to cancel the operation. </param>
        /// <exception cref="ArgumentNullException"> <paramref name="cancellationToken"/> is null. </exception>
        /// <exception cref="ClientResultException"> Service returned a non-success status code. </exception>
        public virtual ClientResult WithCancellationToken(string cancellationToken, CancellationToken cancellationToken0 = default)

We have two cancellationToken in the xml doc.

How to reproduce:

1. cd into packages/http-client-csharp directory
2. Run script ./eng/scripts/Generate.ps1 special-words -Stubbed $false
3. Run dotnet build ./generator/TestProjects/CadlRanch/http/special-words/SpecialWords.sln and you would see this cannot build.

[jsquire]

@ArcturusZhang / @ArthurMa1978: This needs additional context. What's the scenario that would introduce this case? What's the TypeSpec look like? How would someone who was going to work on this repro what you're seeing?

[ArcturusZhang]

@ArcturusZhang / @ArthurMa1978: This needs additional context. What's the scenario that would introduce this case? What's the TypeSpec look like? How would someone who was going to work on this repro what you're seeing?

let me add some more details in this issue (and some similar others)