field access generalized identifiers highlight as seperate tokens

Summary

This is minor: field access without quoted-identifiers highlight as separate tokens.
ex: The textmate scope of in in [Records in Range] is a language keyword

I wasn't sure whether this is at the extension level or microsoft/powerquery-parser I put it here because even though textmate's scope is a keyword -- the parser seems to format correctly. I tried using a strange generalized-identifier to see if I could break the formatting, but it did not.

Power BI's editor has the same behaviour

Test Query

let
    Source = ...,
    #"Total Records1" = Table.AddColumn(
        Source, "Count 1",
        each Table.RowCount( [#"Records in Range"] ),
        type number
    ),
    #"Total Records2" = Table.AddColumn(
        Source, "Count 2",
        each Table.RowCount( [Records in Range] ),
        type number
    )

in
    #"Total Records2"

Start with the extension's syntax-highlighting grammar, especially the Expand grammar noted in the issue, and compare its scopes for the quoted and unquoted field-access forms in the Test Query. Check whether the behavior belongs in vscode-powerquery or microsoft/powerquery-parser. Done means generalized identifiers such as [Records in Range] no longer highlight words like “in” as standalone language keywords.