Add missing pass (#6505)

Author: John Reese

docs/core/testing/unit-testing-with-dotnet-test.md

@@ -129,7 +129,7 @@ namespace Prime.UnitTests.Services
 
 The `[Fact]` attribute indicates a test method that is run by the test runner. From the *PrimeService.Tests* folder, execute [`dotnet test`](../tools/dotnet-test.md) to build the tests and the class library and then run the tests. The xUnit test runner contains the program entry point to run your tests. `dotnet test` starts the test runner using the unit test project you've created.
 
-Your test fails. You haven't created the implementation yet. Make this test by writing the simplest code in the `PrimeService` class that works. Replace the existing `IsPrime` method implementation with the following code:
+Your test fails. You haven't created the implementation yet. Make this test pass by writing the simplest code in the `PrimeService` class that works. Replace the existing `IsPrime` method implementation with the following code:
 
 ```csharp
 public bool IsPrime(int candidate)