Added It block around querying multiple SQL Server instances.

PSKoans/Koans/Modules/dbatools/AboutQueryingDatabases.ps1

@@ -55,14 +55,16 @@ Describe "Invoke-DbaQuery" {
         $Bar.database_name | Should -Be 'master'
     }
 
-    <#
-        Invoke-DbaQuery allows you to query a single database, multiple databases, or even multiple
-        servers.
-        The T-SQL command @@SERVERNAME returns the name of the server that the database is on. We can
-        use this to see what instance we are connected to.
-    #>
-    $ManyServers = 'localhost', 'localhost\SQLDEV2K14' | Invoke-DbaQuery -Query "SELECT @@SERVERNAME AS __;"
-    $ManyServers.server_name | Should -BeIn 'localhost', 'localhost\SQLDEV2K14'
+    It 'Queries multiple SQL Server instances...' {
+        <#
+            Invoke-DbaQuery allows you to query a single database, multiple databases, or even multiple
+            servers.
+            The T-SQL command @@SERVERNAME returns the name of the server that the database is on. We can
+            use this to see what instance we are connected to.
+        #>
+        $ManyServers = 'localhost', 'localhost\SQLDEV2K14' | Invoke-DbaQuery -Query "SELECT @@SERVERNAME AS __;"
+        $ManyServers.server_name | Should -BeIn 'localhost', 'localhost\SQLDEV2K14'
+    }
 
     <#
         It is possible to save T-SQL scripts into files. Invoke-DbaQuery has the ability to use the