--- a/doc/conf.py	Mon Aug 14 21:09:48 2017 +0300
+++ b/doc/conf.py	Mon Aug 14 21:20:32 2017 +0300
@@ -11,7 +11,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+import sys
+import os
 
 # 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