“” should produce empty title. Fixes #1562 (#1565)
“” should produce empty title. Fixes #1562 (#1565)


vega/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite