pydata/pandas — pull request #9122 by TomAugspurger (2014-12-21 15:44:10+00:00)
Title: Remove bar line

Closes https://github.com/pydata/pandas/issues/9088 and https://github.com/pydata/pandas/issues/7128

Votes on whether we should

1. Remove the line entirely
2. Add a parameter to `.plot` control whether the line should be added.

I vote for 1, but I can go either way.