test_legend_dots fails on matplotlib 1.4.3

[QuLogic]

After applying #37, there is one more failure in the above test. It looks like the result is a little different:

opening figure
  opening axes
    draw line with 3 points
    draw 3 markers
    opening legend
    draw text 'None' None
    draw line with 2 points
    draw text 'label' None
    draw 2 markers
    draw text 'dots' None
    draw path with 4 vertices
    closing legend
  closing axes
closing figure

There's some extra text, and one less vertex in the last path.

[jakevdp]

Yes, currently we test with matplotlib 1.3, and I know of many such test failures with 1.4. mpld3 relies on the private matplotlib class hierarchy, which changed between versions 1.3 to 1.4 (and will likely change again with 1.5). This is not meant to be accessed outside the matplotlib package, so hacks like mpld3 will break between versions.

There doesn't seem to be motivation/time among mpld3 developers and users to track-down and fix all these issues, so for the time being I'd suggest down-grading to matplotlib 1.3. Another option is for you to join the team contribute fixes – let me know if you'd like to be involved. In any case, once MEP25 happens, we can do a re-write of the package to use this serialization interface and then (hopefully) mpld3 will not be so tied to particular matplotlib versions.