bzr FTBFS if built against python-docutils 0.9.1:
| /usr/bin/make docs
| make[2]: Entering directory `/build/bzr-nIQUDo/bzr-2.6.0~bzr6526'
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/en/tutorials/tutorial.txt "doc/en/tutorials/tutorial.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/en/tutorials/using_bazaar_with_launchpad.txt "doc/en/tutorials/using_bazaar_with_launchpad.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/en/tutorials/centralized_workflow.txt "doc/en/tutorials/centralized_workflow.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ru/tutorials/centralized_workflow.txt "doc/ru/tutorials/centralized_workflow.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ru/tutorials/tutorial.txt "doc/ru/tutorials/tutorial.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ru/tutorials/using_bazaar_with_launchpad.txt "doc/ru/tutorials/using_bazaar_with_launchpad.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ja/tutorials/tutorial.txt "doc/ja/tutorials/tutorial.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ja/tutorials/using_bazaar_with_launchpad.txt "doc/ja/tutorials/using_bazaar_with_launchpad.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ja/tutorials/centralized_workflow.txt "doc/ja/tutorials/centralized_workflow.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/en/mini-tutorial/index.txt "doc/en/mini-tutorial/index.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/es/mini-tutorial/index.txt "doc/es/mini-tutorial/index.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ja/mini-tutorial/index.txt "doc/ja/mini-tutorial/index.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ru/mini-tutorial/index.txt "doc/ru/mini-tutorial/index.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/en/user-guide/index-plain.txt doc/en/user-guide/index-plain.html
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/es/user-guide/index-plain.txt "doc/es/user-guide/index-plain.html"
| python tools/rst2html.py --link-stylesheet --footnote-references=superscript --halt=warning --stylesheet=../../default.css doc/ja/user-guide/index-plain.txt "doc/ja/user-guide/index-plain.html"
| doc/ja/user-guide/http_smart_server.txt:161: (WARNING/2) Inline interpreted text or phrase reference start-string without end-string.
| Exiting due to level-2 (WARNING) system message.
| make[2]: *** [doc/ja/user-guide/index-plain.html] Error 1
