remove double plus

src/Result.php

@@ -54,7 +54,7 @@ final class Result
                 $returnCode = self::FAILURE_EXIT;
             }
 
-            $warnings = $result->numberOfTestsWithTestTriggeredPhpunitWarningEvents() +
+            $warnings = $result->numberOfTestsWithTestTriggeredPhpunitWarningEvents()
                 + count($result->warnings())
                 + count($result->phpWarnings());