Why is our footer off centre? Noted when reviewing #15305 <img width="1322" alt="Untitled 2" src="https://user-images.githubusercontent.com/1562854/65265343-8ec1f880-dac5-11e9-9a0f-7ba161cf8990.png"> _Originally posted by @jklymak in https://github.com/matplotlib/matplotlib/pull/15305#issuecomment-533224063_