SVG output broken

[mdboom]

SVG output is broken, as validated through http://validator.w3.org/#validate_by_upload
e.g. run the following and upload the output, and the id's on elements are used multiple times:

from matplotlib.figure import Figure
from matplotlib.backends.backend_svg import FigureCanvasSVG

def get_series():
    yield [2.5, 1.5, 0.5], [1.1, 2.1, 3.1], dict(color='b', hatch='|')
    yield [2.6, 1.6, 0.6], [1.2, 2.2, 3.2], dict(color='r', hatch='|')

def do_chart(file):
    fig = Figure(facecolor='#FFFFFF')
    canvas = FigureCanvasSVG(fig)
    ax = fig.add_subplot(1, 1, 1)
    for xs, ys, attributes in get_series():
        ax.barh(xs, ys, 0.1, **attributes)
    canvas.print_figure(from_file)

if __name__ == '__main__':
    from_file = r"C:\temp\prob.svg"
    do_chart(from_file)

[mdboom]

This pull request seems to resolve this issue. Can you please test, if possible?

[ruidc]

Confirmed fixed for this scenario, I do have another where the following still fails validation:

required attribute "d" not specified
      <path id="Taz-SemiLight-20"/>

but this will take quite a while to produce a reduced test case.