Flake8 fixes, mostly whitespace after commas
Flake8 fixes, mostly whitespace after commas

A handful of TODO notes for things that I had to restrain myself to avoid doing in this PR

The only non-aesthetic edit made here is deleting forecast_cov, which was identical to mse

ChadFulton/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,jseabold/statsmodels,ChadFulton/statsmodels,statsmodels/statsmodels,josef-pkt/statsmodels,jseabold/statsmodels,statsmodels/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,jseabold/statsmodels,ChadFulton/statsmodels,bashtage/statsmodels,jseabold/statsmodels,jseabold/statsmodels,ChadFulton/statsmodels,statsmodels/statsmodels,ChadFulton/statsmodels,ChadFulton/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,statsmodels/statsmodels,bashtage/statsmodels,josef-pkt/statsmodels