README.md in ffi-libfuse-0.3.4 vs README.md in ffi-libfuse-0.4.0

- old
+ new

@@ -82,10 +82,10 @@
     @content
   end
 end
 
 # Start the file system
-FFI::Libfuse.fuse_main(operations: HelloFS.new) if __FILE__ == $0
+exit(FFI::Libfuse.fuse_main(operations: HelloFS.new)) if __FILE__ == $0
 
 ```
 <!-- SAMPLE END: sample/hello_fs.rb -->
 
 Mount the filesystem