StructDiscriminatedUnionAnalyzer vs. StructuredFormatDisplayAttribute

[Numpsy]

Describe the bug
I was just running a new project through the analyzers, and had thought that I might get a StructDiscriminatedUnionAnalyzer suggestion from a DU that only has empty and string members, but I got nothing.

Looking at my code, the DU in question has a StructuredFormatDisplay attribute, and removing that causes a Consider adding [<Struct>] to Discriminated Union suggestion to appear.

I'm not sure if that is intentional or not, but looking at the analyzer code I wonder if the StartsWith("Struct" at

ionide-analyzers/src/Ionide.Analyzers/Suggestion/StructDiscriminatedUnionAnalyzer.fs

Line 29 in e66e603

| Some structIdent -> structIdent.idText.StartsWith("Struct", StringComparison.Ordinal)

is perhaps matching more things than it should?

To Reproduce

Running the analyzer against a DU such as

type LicenseValidationResult =
    | Valid
    | Invalid of error: string

results in a Hint IONIDE-012 : Consider adding [<Struct>] to Discriminated Union suggestion, but running it against

[<StructuredFormatDisplay("{DisplayText}")>]
type LicenseValidationResult =
    | Valid
    | Invalid of error: string

has no hint.

Environment (please complete the following information):
Ionide analyzers version 0.11.0

[nojaf]

Thanks for reporting this. Yes, our check could be better I see.
Would you be interested in submitting a PR for this?

[Numpsy]

I'll have a look