x-labels in groupedbars are taken as math expressions

[alfaromartino]

The issue shows up under pgfplotsx

MWE

using StatsPlots; pgfplotsx()

xx = repeat(["This is a name","This is another name", "and a 3rd name"], 4)
variable = repeat(["category 1","category 2"], 6)
value = rand(12)

groupedbar(xx, value, group = variable)

Output is

When you open the file in tex, it show that all the names are expressed within "$ $"