pydata/pandas — pull request #6447 by cpcloud (2014-02-22 21:33:01+00:00)
Title: BUG/TST: read_html should follow pandas conventions when creating empty data

closes #5129

This a very specific bug fix. Only using `lxml` exposes this bug, whereas using
`bs4` raises an exception. `lxml` drops data which allows it to parse the multiindex
header differently and succeed.