crm,Formulator: fix handling of non breakable space unicode characters

This was not correct on python3
10 jobs for zope4py3 in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Zope4Py3

01:50:00

failed ERP5.CodingStyleTest-Zope4Py3-py2

00:54:31

failed ERP5.UnitTest-Zope4Py3

02:54:21

passed ERP5.UnitTest-Zope4Py3-Py2

02:28:11

passed ERP5.CodingStyleTest-Zope4Py3

01:52:56

passed ERP5.CodingStyleTest-Zope4Py3

01:03:08

failed ERP5.UnitTest-Zope4Py3

04:03:35

failed ERP5.UnitTest-Zope4Py3

01:56:17

passed ERP5.UnitTest-Zope4Py3-Py2

03:03:14

passed ERP5.UnitTest-Zope4Py3-Py2

01:48:26