typo in doc

Author: pylessard

doc/source/conf.py

@@ -14,6 +14,7 @@
 
 import sys
 import os
+from os.path import abspath, join, dirname, normpath
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the