`dotnet-format` reports errors *only* in `--verify-no-changes` mode for ?: expressions

[AArnott]

Describe the bug

When dealing with ? : C# expressions, dotnet format falsely reports whitespace errors when run with --verify-no-changes.

To Reproduce

git clone https://github.com/AArnott/vs-threading
cd vs-threading
git checkout 52a1e174661987de31061a47df64076f11cb8366
dotnet format --verify-no-changes

Produces this output:

/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/ListOfOftenOne`1.cs(256,60): error WHITESPACE: Fix whitespace formatting. Delete 1 characters. [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]
/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/RarelyRemoveItemSet`1.cs(217,61): error WHITESPACE: Fix whitespace formatting. Delete 1 characters. [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]
/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/ListOfOftenOne`1.cs(256,59): warning SA1011: Closing square bracket should be followed by a space [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]
/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/RarelyRemoveItemSet`1.cs(217,60): warning SA1011: Closing square bracket should be followed by a space [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]
/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/ListOfOftenOne`1.cs(256,60): warning SA1003: Operator '?' should be preceded by whitespace. [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]
/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/RarelyRemoveItemSet`1.cs(217,61): warning SA1003: Operator '?' should be preceded by whitespace. [/workspaces/vs-threading/src/Microsoft.VisualStudio.Threading/Microsoft.VisualStudio.Threading.csproj]

The lines in question are:

            this.currentIndex = this.enumeratedValue is T[] ? IndexBeforeFirstArrayElement : IndexBeforeSingleElement;

and

            this.currentIndex = this.enumeratedValue is T?[] ? IndexBeforeFirstArrayElement : IndexBeforeSingleElement;

But these lines are well formatted. And in fact running dotnet format without the --verify-no-changes switch applies no change to the syntax.

Further technical details

dotnet --info                                 
.NET SDK:
 Version:           8.0.100
 Commit:            57efcf1350
 Workload version:  8.0.100-manifests.6c33ef20

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /root/.dotnet/sdk/8.0.100/

.NET workloads installed:
 Workload version: 8.0.100-manifests.6c33ef20
There are no installed workloads to display.

Host:
  Version:      8.0.0
  Architecture: x64
  Commit:       5535e31a71

.NET SDKs installed:
  7.0.401 [/root/.dotnet/sdk]
  8.0.100 [/root/.dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 7.0.11 [/root/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 8.0.0 [/root/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.25 [/root/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.11 [/root/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.14 [/root/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 8.0.0 [/root/.dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/root/.dotnet]

global.json file:
  /workspaces/vs-threading/global.json

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download