[enh] display CWConstraint type in its repr
This will change CWConstraint repr from something like:
<Entity CWConstraint 314282 [] at 140127700141904>
To:
<Entity CWConstraint 314282 of type UniqueConstraint [] at 140127700141904>
To help improve debugging UX a little bit.
.. _web_module:
:mod:`cubicweb.web`
===================
.. automodule:: cubicweb.web
Exceptions
----------
.. autoexception:: DirectResponse
.. autoexception:: InvalidSession
.. autoexception:: PublishException
.. autoexception:: LogOut
.. autoexception:: Redirect
.. autoexception:: StatusResponse
.. autoexception:: RequestError
.. autoexception:: NothingToEdit
.. autoexception:: ProcessFormError
.. autoexception:: NotFound
.. autoexception:: RemoteCallFailed