Fails when trying to encode a filename (backslashes) where folder starts with "n"

The library fails when I try to encode a path for a filename, where one of the folders starts with an "n".

Here's the sample code to encode: `Export\\nb - Norwegian\\1501M11\\2 - TrackMeta, (70790914-f2de-4e86-aa22-67b640c9acf9).mp3`

And here is what I get: `Export\\[SlashN]b - Norwegian\\\\1501M11\\\\2 - TrackMeta, (70790914-f2de-4e86-aa22-67b640c9acf9).mp3`
