Followup of 94739085.

key()-based sorting is now used instead, available since Python 2.4.

Jupyter integration is more or less abandoned. Just do the minimum to make tests pass.

Also, remove `if True/1/False/0` statement raising pylint warnings.
Co-authored-by: Arnaud Fontaine <arnaud.fontaine@nexedi.com>

* Zope API changes:
  + publish():
    - stdin is now BytesIO rather than StringIO.
    - Returned value of a script is passed to str() in python2, not in python3 anymore.
  + HTTPResponse `body` property is now bytes().
  + OFS.Image.File file parameter is bytes().
  + zope.interface implements() is now @implementer decorator.
  + Python standard logging module recommended instead of zLOG.
* Python3 API changes:
  + builtin reduce() was removed.
  + urlnorm is now available.
  + Use BytesIO rather than StringIO to follow py3 API.
  + hmac.new() requires digestmod argument from Python 3.8.
  + Use six.moves library to handle moved objects from py2 to py3.
  + `modernize -f xrange_six` then slightly adjusted manually to just use range
     where it does not make a significant difference (for example in test).
  + base64.b64encode() now expects bytes().
  + UserDict() interface changed:
    - New parameter in update() and pop().
    - `failobj` setdefault parameter renamed to `default`.
  + ensure_list() on dict.{values,items}() and list(dict) for dict.keys() when
    we really need a list and not an iterable (Python3).
    - Add ensure_list() to RestrictedPython safe_builtins as it's very common usage.
  + Make dict iteration works on both version of Python.
    - Use six.iter{items,values,keys}().
    - has_key() has been removed.
    - Make sure that dict.{items,values,keys}() returns a real list when
    modified (ensure_list()).
  + Comparisons between int and NoneType raises TypeError.
    + BTrees key must be str() not int() (_getOb()).
  + No more unbound methods in python3 so use six.get_unbound_function().
  + Exceptions:
    - No longer behave as sequences. Using `args` attribute instead.
    - When an exception has been assigned using `as target`, it is cleared at
      the end of the except clause.
  + file: py2 was returning `str` upon reading, now it returns text strings.
    Also, opening mode is text strings by default.
  + Data strings are bytes().
    - Replace str() by bytes().
  + iterators no longer have next() method, instead there is next() builtin.
  + New ConnectionError exception so rename existing one to not clash.
  + Integer division is now with //.
  + __nonzero__ is now __bool__.
  + apply() does not exist anymore.
  + Deprecated threading.Thread isAlive() has been removed.
  + im_func replaced by __func__.
  + Use six.with_metaclass() to define metaclass in a cross-compatible way with py2 and py3.
  + Only test method can be marked as expectedFailure(), not assert statement anymore.
  + os.path.walk() removed.
  + HTMLParser never fails: no strict mode nor HTMLParseError anymore (Python #15114).
  + Unpickler.find_global() is now Unpickler.find_class().
Co-Authored-by: Kazuhiko SHIOZAKI <kazuhiko@nexedi.com>
Co-Authored-by: Arnaud Fontaine <arnaud.fontaine@nexedi.com>
Co-Authored-by: Carlos Ramos Carreño <carlos.ramos@nexedi.com>
Co-Authored-by: Emmeline Vouriot <emmeline.vouriot@nexedi.com>

some conversion (TextDocument) depend on the content type, so it's
necessary to first update the content type before trying to convert to
base format

zope5: Since 5.8.1 missing Content-Type HTTP header is interpreted as application/x-www-form-urlencoded.

Zope.git:
  commit 5b324f6c461f5ea1cc069739b6c32a1a5ff59df9
  Date:   Thu Jan 19 07:15:18 2023 +0100
    replace `cgi.FieldStorage` by `multipart` (#1094)
    * interpret a missing `CONTENT_TYPE` as `application/x-www-form-urlencoded`

With cgi.FieldStorage, it was interpretated as text/plain so Content-Type has to
be provided now (even for WebDAV despite RFC 4918 stating that it *SHOULD* be
provided).

Some Unit Tests did not provide such header at all but this was wrong (such as
erp5_stripe:testStripe where the real request has application/json as
Content-Type and not text/plain).

   Fix inconsistency on guard and permissions

   Fixup the inconsistent restart/restart_action transition, that has
     Assignee/Assignor guard in am inconsistent matter.

   Allow assignor have the same permissions and guard than the assignee

   Fix up permissions on delivered state, where the Assignor had no
   permission to view/access accounting period (so deliver by assignor
   only was impossible).

See nexedi/erp5@bcd82831

See nexedi/erp5@bcd82831 (comment 216152)

The main query to the hateoas web section must be cache by the browser,
to reduce the number of queries by 2.

Caching policy manager conditions are checked before calculating the query result,
and so, it is not possible anymore to wait for the script to explicitely
ask for the result to be cached.

so that we can identify recently deleted objects, that are important to resynchronise catalog and ZODB in case of a catastrophe.

version up and fix a bug with indentation being 4 spaces (instead of the expected 2 spaces) with empty python files

See merge request !1987

true is not an allowed value, causing a visible problem tabSize to be
ignored on empty documents and using 4 for python.