Satisfy fix-whitespace

Author: philderbeast

cabal-testsuite/PackageTests/ProjectImport/UniquePathDuplicates/cabal.test.hs

@@ -42,4 +42,4 @@ main = cabalTest . withRepo "repo" . recordMode RecordMarked $ do
   wooping <- cabal' "v2-build" [ "--project-file=woops-0.project", "--project-file-parser=legacy", "--dry-run" ]
   assertOutputContains "Warning: 10 imports" wooping
 
-  return ()
+  return ()