Bug#950087: statsmodels: FTBFS with new ipython

[Rebecca N. Palmer]

Package: python-statsmodels-doc
Severity: serious
Control: tags -1 patch
(only tested in 0.11, but believed to exist earlier)

Some documentation examples (e.g. contrasts.rst) fail in a Debian build 
because they need to download data.

This has been the case for some time, but only became an FTBFS when 
ipython 7.x was uploaded, as ipython_directive now defaults to failing 
the build when an example fails.

Fix: turn this off with

--- statsmodels-0.11.0.orig/docs/source/conf.py
+++ statsmodels-0.11.0/docs/source/conf.py
@@ -63,6 +63,7 @@ else:

  # nbsphinx options
  nbsphinx_allow_errors = True
+ipython_warning_is_error = False
  # sphinxcontrib-spelling options
  spelling_word_list_filename = ['spelling_wordlist.txt', 
'names_wordlist.txt']
  spelling_ignore_pypi_package_names = True