Improve appearance of validation output

[YegorStepanov]

trafficstars

Before #2148, like v0.13.2: Master: PR:

no validation errors:

Master:

PR:

[YegorStepanov]

What is the purpose of the double slash? Are they meant to show a newline in the console? For example:

[AndreyAkinshin]

We use double slashes to distinguish user messages from the payload (the results of the measurements). @adamsitnik can we avoid using slashes with the help of our new Pipe approach?

[YegorStepanov]

can we avoid using slashes with the help of our new https://github.com/dotnet/BenchmarkDotNet/pull/2092?

Yes, if we remove the first line or pass the NullLogger to the broker, the measurements and input from generated project will not be printed.

https://github.com/dotnet/BenchmarkDotNet/blob/3906381eaa7a7a28dc8c68eb7582626c858b68e4/src/BenchmarkDotNet/Loggers/Broker.cs#L45-L51

But how can we distinguish user input from measurements (it requires to implement silent mode)?

[Benchmark]
// I haven't tried this, but it looks like we can break the engine.
public void M() => Console.WriteLine("OverheadJitting  100500: 99 op, 24 h, 0 us/op ");

Because it's just parsing the input:

https://github.com/dotnet/BenchmarkDotNet/blob/32bb2deea8771fe5aadc38063b8a3fe1495ccf81/src/BenchmarkDotNet/Reports/Measurement.cs#L105-L124