This bug came up while we were working on codebook. We will need to investigate further to determine when it is breaking. This was discovered when we were using the vertical bar for the dot plots. The overall text mark next to the grouped bars was not renderering. For now, Jeremy hard coded the fix in the call back, but we don't want to continue doing that.

@jwildfire , I don't grok the issue here. For one, text marks aren't affected by color_by. Should they be? Or is the issue that the legend doesn't appear for charts with text marks in addition to other marks?

Nevermind, 'text' isn't a supported legend mark. Defaulting to 'square'.