Use indented string builder, perchance?

[Atulin]

Discussion: dotnet/roslyn#71162

Implementation: https://github.com/dotnet/roslyn/pull/71163/files

[Atulin]

https://github.com/dotnet/efcore/blob/main/src/EFCore/Infrastructure/IndentedStringBuilder.cs