old_contents: from fenced_code_plus import FencedCodePlusExtension
  from fenced_code_plus import makeExtension
  
new_contents: from __future__ import absolute_import
  
  from fenced_code_plus.fenced_code_plus import FencedCodePlusExtension
  from fenced_code_plus.fenced_code_plus import makeExtension
  
subject: Make import compatable with python3.5