Fix flake8 issues since release 3.6.0 Flake8 had a new release which raise new issues, namely: W504: line break after binary operator F841: local variable 'ex' is assigned to but never used W605: invalid escape sequence F821: undefined name 'buffer' (noqa seems the only way to avoid this false positive) Also pin flake8>=3.6 in our tests and make explicit that we use python3 to run flake8 tests.

.. -*- coding: utf-8 -*-

.. _Part1:

--------------------------
Introduction to *CubicWeb*
--------------------------

This first part of the book offers different reading path to
discover the *CubicWeb* framework, provides a tutorial to get a quick
overview of its features and lists its key concepts.


.. toctree::
   :maxdepth: 2
   :numbered:

   history
   concepts.rst