statsmodels/statsmodels — pull request #1770 by josef-pkt (2014-06-18 16:16:55+00:00)
Title: TST: anova with `-1` noconstant, add tests

adds unit test for noconstant case for ANOVA

issue #1213 looks outdated, results in examples are the same as in R without changes

where/when was this fixed

AFAIU: `df_model` doesn't know anything about a constant