message: Add '.1%' to number format options
diff: @@ -18,6 +18,7 @@ const D3_FORMAT_DOCS = 'D3 format syntax: https://github.com/d3/d3-format';
  const D3_FORMAT_OPTIONS = [
  ['.1s', '.1s | 12k'],
  ['.3s', '.3s | 12.3k'],
  + ['.1%', '.1% | 12.3%'],
  ['.3%', '.3% | 1234543.210%'],
  ['.4r', '.4r | 12350'],
  ['.3f', '.3f | 12345.432'],
  