[entity] Add a cw_related_rqlst method returning the RQL select node of cw_related method
This is useful if one wants to modify the query before execution.
A bit a PEP8 style fix in tests along the way.
Related to #12306543.
.. _TutosPhotoWebSite:
Building a photo gallery with |cubicweb|
========================================
Desired features
----------------
* basically a photo gallery
* photo stored on the file system and displayed dynamically through a web interface
* navigation through folder (album), tags, geographical zone, people on the
picture... using facets
* advanced security (not everyone can see everything). More on this later.
.. toctree::
:maxdepth: 2
part01_create-cube
part02_security
part03_bfss
part04_ui-base
part05_ui-advanced