Fix container name display when running non-file types (fixes #2639).

Use a helper that formats the container name correctly for all container
types, notably also for ScriptBlocks.

Author: davidmatson

src/csharp/Pester/ContainerInfo.cs

@@ -11,6 +11,7 @@ public static ContainerInfo Create()
             return new ContainerInfo();
         }
 
+        public string Name { get => ToStringConverter.ContainerItemToString(Type, Item); }
         private string _type = Constants.File;
         public string Type
         {

src/functions/Output.ps1

@@ -560,10 +560,8 @@ function Get-WriteScreenPlugin ($Verbosity) {
         $p.ContainerRunStart = {
             param ($Context)
 
-            if ("file" -eq $Context.Block.BlockContainer.Type) {
-                # write two spaces to separate each file
-                Write-PesterHostMessage -ForegroundColor $ReportTheme.Container "`nRunning tests from '$($Context.Block.BlockContainer.Item)'"
-            }
+            # write two spaces to separate each container
+            Write-PesterHostMessage -ForegroundColor $ReportTheme.Container "`nRunning tests from '$($Context.Block.BlockContainer.Name)'"
         }
     }