Added set-variable tests

src/pester-tests/Test-Set-Variable.Tests.ps1

@@ -50,6 +50,7 @@
 
         $output = $input | Format-List -Property Description | Out-String
 
+        # This will cause errors running these tests in windows
         $output | Should Be "`n`nDescription : test description`n`n`n`n"
     }