[parse-a-srcset-attribute.html]
  type: testharness
  ["data:,a 1.x"]
    expected: FAIL

  ["data:,a +1x"]
    expected: FAIL

  ["data:,a  1x" (leading U+2009)]
    expected: FAIL

  ["data:,a  1x" (leading U+200A)]
    expected: FAIL

  ["data:,a ‌1x" (leading U+200C)]
    expected: FAIL

  ["data:,a ‍1x" (leading U+200D)]
    expected: FAIL

