Multiline item values get truncated

[kzu]

Whether these are from project properties or direct constant items, when they are presisted via the editorconfig used for analyzer options, causes this issue.

The persistence in editorconfig does not escape newlines in any way, causing only the first line to be visible to analyzers.

[OoLunar]

I still seem to be having this problem:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <Nullable>enable</Nullable>
    <OutputType>Exe</OutputType>
    <ProjectRoot>$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildProjectDirectory), "Tomoe.sln"))</ProjectRoot>
    <RepositoryUrl>https://github.com/OoLunar/Tomoe</RepositoryUrl>
    <SuppressNETCoreSdkPreviewMessage>true</SuppressNETCoreSdkPreviewMessage>
    <TargetFramework>net8.0</TargetFramework>
    <Version>6.0.5</Version>
    <GenerateDocumentationFile>true</GenerateDocumentationFile>
    <ProjectFile>$([System.IO.File]::ReadAllText("/home/lunar/Code/OoLunar/Tomoe/src/Tomoe.csproj"))</ProjectFile>
  </PropertyGroup>
  <ItemGroup>
    <None Include="$(ProjectRoot)/res/config.json" CopyToOutputDirectory="PreserveNewest" />
    <PackageReference Include="BenchmarkDotNet" Version="0.14.0" />
    <PackageReference Include="Humanizer" Version="2.14.1" />
    <PackageReference Include="LiveChartsCore.SkiaSharpView" Version="2.0.0-rc3.3" />
    <PackageReference Include="LiveChartsCore" Version="2.0.0-rc3.3" />
    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="4.11.0" />
    <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.2" />
    <PackageReference Include="Microsoft.Extensions.Configuration.CommandLine" Version="8.0.0" />
    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="8.0.0" />
    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
    <PackageReference Include="Npgsql" Version="8.0.4" />
    <PackageReference Include="Serilog" Version="4.0.2" />
    <PackageReference Include="Serilog.Extensions.Hosting" Version="8.0.0" />
    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.5" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.88.8" />
    <PackageReference Include="System.Text.Json" Version="8.0.4" />
    <PackageReference Include="ThisAssembly" Version="2.0.3">
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
      <PrivateAssets>all</PrivateAssets>
    </PackageReference>
    <ProjectReference Include="$(ProjectRoot)/libs/DSharpPlus/DSharpPlus.Commands/DSharpPlus.Commands.csproj" />
    <ProjectReference Include="$(ProjectRoot)/libs/XMLDocs.NET/src/XmlDocs.NET.csproj" />
    <ProjectProperty Include="TargetFramework" />
    <ProjectProperty Include="Version" />
    <ProjectProperty Include="RepositoryUrl" />
    <ProjectProperty Include="ProjectFile" />
    <ProjectProperty Include="ProjectRoot" />
  </ItemGroup>
</Project>

Where the value of Assembly.Project.ProjectFile becomes |<Project Sdk="Microsoft.NET.Sdk">

[kzu]

Newlines aren't supported in analyzer settings/options. Is the issue the extra | character at the beginning? Which version are you using?

I added a test and additional docs and support for specifying a Comment attribute on your project property element, so you can workaround the invalid XML issue.

See #420