[RCS1260] False Positive

[viceroypenguin]

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Product and Version Used: Roslynator.Analyzers

Steps to Reproduce: set .editorconfig values:

roslynator_trailing_comma_style = omit_when_single_line
dotnet_diagnostic.RCS1260.severity = warning

Actual Behavior: Warning RCS1260 on the , at the end of Property1

var value = new Object
{
    Property1 = "Value"{|RCS1260:,|}
}

Expected Behavior: No warning

var value = new Object
{
    Property1 = "Value",
}

Possible correction:

I believe the following code relies solely on the initializer.Expressions syntax node, when it should be based on the initializer code.

https://github.com/dotnet/roslynator/blob/7505ae82a935905c8e4733f3c4bf719f6b5fb446/src/Analyzers/CSharp/Analysis/AddOrRemoveTrailingCommaAnalyzer.cs#L67

Other IsSingleLine() checks in this file need similar review.