This tests that any which space before semicolon separators in
a values=""
attribute on an animation element is ignored.
The test consists of a single rectangle whose height is animated
with a values=" 0 ; 50 "
attribute.
Run the test. No interaction required.
The test is passed if the rectangle is animated from a height of 0 to a height of 50 over four seconds, starting from when the test is loaded.