Error with column names that contain []

[davidanthoff]

When I try to load the following CSV file:

Col1,Col2 [b],Col3
2,4,5
6,3,5

with the version at https://vega.github.io/voyager/, I get an error Cannot read property 'b' of undefined. I get the same type of error in the Julia wrapper for tables that have column names of that pattern.