axis labels for y axes

[astraw]

First off, many thanks for DABEST and everyone's work on estimation statistics.

I was looking at the initial example in README.md and see that there is no label on the y axis of the swarmplot. Checking the docstring of iris_dabest.mean_diff.plot, I found the kwarg swarm_label which allows me to set this. Indeed, using this works. However, the description of the kwarg suggests that it axis will be automatically labeled:

If `swarm_label` is not specified, it defaults to
"value", unless a column name was passed to `y`. If
`contrast_label` is not specified, it defaults to the effect size
being plotted.

However, the behavior I see (also shown in the README.md plot) is neither "value" nor the column name ("petal_width" in this case), but empty. So, I think there is either a bug in the docstring or the implementation.

Furthermore, I think all plots should have the y axis of the swarmplots labeled by default. I see in the tutorial, for example, that this is not the case.

[josesho]

Thanks for spotting this discrepancy between the docstring, the tutorial, and the actual output! This will be fixed in the forthcoming release.