These are useless, git complain about them and they cause unnecessary diffs when having editor configured to automatically remove spaces at end of lines, so let's do a big commit to remove them all at once

See merge request !1672

done with:

    find product/ bt5 -name '*.py' | xargs -n 1 sed -i 's/ *$//'

fixup!  * Fix escaping chars in FormGroup title  * Use lxml to produce XML view  * Update XMLToForm to follow escaping changes

some elements were double escaped.

See merge request nexedi/erp5!1621

It seems to accept int, but version is supposed to be a string.

See merge request nexedi/erp5!1671