[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.
@echo off
rem = """-*-Python-*- script
rem -------------------- DOS section --------------------
rem You could set PYTHONPATH or TK environment variables here
python -x "%~f0" %*
goto exit
"""
# -------------------- Python section --------------------
import sys
from os.path import join, dirname, normpath
sys.path.insert(0, normpath(join(dirname(__file__), '..', '..')))
from cubicweb.cwctl import run
run(sys.argv[1:])
DosExitLabel = """
:exit
rem """