Test code cleanup. Killed many warnings.

Author: tig

Terminal.Gui/ConsoleDrivers/AnsiEscapeSequence.cs

@@ -33,7 +33,7 @@ public class AnsiEscapeSequence
     ///         to the oldest outstanding request.
     ///     </para>
     /// </summary>
-    public required string Terminator { get; init; }
+    public required string? Terminator { get; init; }
 
 
 

Terminal.Gui/ConsoleDrivers/AnsiEscapeSequenceRequest.cs

@@ -12,7 +12,7 @@ public class AnsiEscapeSequenceRequest : AnsiEscapeSequence
     ///     Invoked when the console responds with an ANSI response code that matches the
     ///     <see cref="AnsiEscapeSequence.Terminator"/>
     /// </summary>
-    public required Action<string> ResponseReceived { get; init; }
+    public required Action<string?> ResponseReceived { get; init; }
 
     /// <summary>
     ///     Invoked if the console fails to responds to the ANSI response code