[formrenderers] if a tag object gets there, it blows (closes #2410462)
- cwtags monkeypatches cubicweb's UStringIO's .write and .getvalue methods
- but it cannot monkeypatch list.append ...
debian/tmp/usr/bin/cubicweb-ctl usr/bin/
debian/tmp/usr/lib/PY_VERSION/site-packages/cubicweb/cwctl.py usr/lib/PY_VERSION/site-packages/cubicweb
debian/cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl