ComponentTool: update new test snippet

On recent pylint, this is flagged as unnecessary-pass

Also update the link that was pointing to python2 doc
5 jobs for zope4py3 in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Zope4Py3

09:01:12

failed ERP5.UnitTest-Zope4Py3

04:33:04

failed ERP5.UnitTest-Zope4Py3-Py2

02:16:38

failed ERP5.UnitTest-Zope4Py3

04:05:28

failed ERP5.UnitTest-Zope4Py3-Py2

01:19:53