fix unsyspath in non windows

Author: willmcgugan

fs/osfs/__init__.py

@@ -182,10 +182,12 @@ def unsyspath(self, path):
         :rtype: string
 
         """
+        # TODO: HAve a closer look at this method
         path = os.path.normpath(os.path.abspath(path))
         path = self._decode_path(path)
-        if len(path) == 6 and not path.endswith("\\"):
-            path = path + "\\"
+        if sys.platform == "win32":
+            if len(path) == 6 and not path.endswith("\\"):
+                path = path + "\\"
         prefix = os.path.normcase(self.root_path)
         if not prefix.endswith(os.path.sep):
             prefix += os.path.sep