Generic/SpaceAfterNot: rename test case file

Doing this to be able to create tests with syntax errors on separate
files.

Author: rodrigoprimo

src/Standards/Generic/Tests/Formatting/SpaceAfterNotUnitTest.inc renamed to src/Standards/Generic/Tests/Formatting/SpaceAfterNotUnitTest.1.inc

@@ -33,7 +33,7 @@ final class SpaceAfterNotUnitTest extends AbstractSniffUnitTest
     public function getErrorList($testFile='')
     {
         switch ($testFile) {
-        case 'SpaceAfterNotUnitTest.inc':
+        case 'SpaceAfterNotUnitTest.1.inc':
             return [
                 3  => 2,
                 4  => 2,