Ignore failing cabal-fmt test on windows

Author: fendor

Diff for: plugins/hls-cabal-fmt-plugin/test/Main.hs

@@ -39,7 +39,8 @@ tests found = testGroup "cabal-fmt"
   [ cabalFmtGolden found "formats a simple document" "simple_testdata" "formatted_document" $ \doc -> do
       formatDoc doc (FormattingOptions 2 True Nothing Nothing Nothing)
 
-  , cabalFmtGolden found "formats a document with expand:src comment" "commented_testdata" "formatted_document" $ \doc -> do
+  , knownBrokenOnWindows "expand:src comment bug in cabal-fmt on windows" $
+    cabalFmtGolden found "formats a document with expand:src comment" "commented_testdata" "formatted_document" $ \doc -> do
       formatDoc doc (FormattingOptions 2 True Nothing Nothing Nothing)
 
   , cabalFmtGolden found "formats a document with lib information" "lib_testdata" "formatted_document" $ \doc -> do