old_contents: __version__ = "0.13"
  
  # Void cython.* directives (for case insensitive operating systems). 
  from Cython.Shadow import *
  
new_contents: __version__ = "0.13+"
  
  # Void cython.* directives (for case insensitive operating systems). 
  from Cython.Shadow import *
  
subject: Change version number for dev branch.