add copyFile to the export list
-- * Actions on files
, removeFile -- :: FilePath -> IO ()
, renameFile -- :: FilePath -> FilePath -> IO ()
-- * Actions on files
, removeFile -- :: FilePath -> IO ()
, renameFile -- :: FilePath -> FilePath -> IO ()
+ , copyFile -- :: FilePath -> FilePath -> IO ()
-- * Existence tests
, doesFileExist -- :: FilePath -> IO Bool
-- * Existence tests
, doesFileExist -- :: FilePath -> IO Bool