Verify the "stroke-dasharray" and "stroke-dashoffset" properties. Two lines are drawn, one red and one black.
Both have a "stroke-dasharray" of "10,10" giving a dashed appearance where the size of the gaps and the size of
the dash is equal. The help show this, the black line has a "stroke-dashoffset" so that the dashes in the black
line match up with the gaps in the red line.
The test uses the "path" element, "stroke", "stroke-width", "stroke-dasharray" and "stroke-dashoffset", "font-family"
(Arial) and "font-size" properties.
