Review: add missing lines

beets/util/__init__.py

@@ -222,12 +222,14 @@ def sorted_walk(path, ignore=(), ignore_hidden=False, logger=None):
         for res in sorted_walk(cur, ignore, ignore_hidden, logger):
             yield res
 
+
 def path_as_posix(path):
     """Return the string representation of the path with forward (/)
     slashes.
     """
     return path.replace(b'\\', b'/')
 
+
 def mkdirall(path):
     """Make all the enclosing directories of path (like mkdir -p on the
     parent).