Fix --figsize help message

3 jobs for figsize in 52 minutes and 39 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
passed build_linux_36 #166468
docker

00:31:28

84.0%
passed build_macosx_36 #166421
macosx

00:21:11

84.0%
failed build_linux_36 #166420
docker

00:09:48