Truncated labels in groupedbar for pyplot backend

[itsdfish]

Hello-

In the following example, the first and last character of each x label is truncated.

using StatsPlots, DataFrames
pyplot()
df = DataFrame(a=repeat(["label1","label2"], outer=2),b=repeat(["a","b"], inner=2), 
     c=rand(4))
@df df groupedbar(:a, :c, group=:b)

Version:

Julia 1.5

Status `~/Projects/ACTR_HMT/Project.toml`
  [a93c6f00] DataFrames v0.21.7
  [f3b207a7] StatsPlots v0.14.13