Remove empty line from fs.walk.Walk.bind docstring

Author: althonos

fs/walk.py

@@ -147,7 +147,6 @@ def bind(cls, fs):
             ~fs.walk.BoundWalker: a bound walker.
 
         Examples:
-
             Use this method to explicitly bind a filesystem instance::
 
                 >>> walker = Walker.bind(my_fs)