Fix --figsize help message

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

00:31:28

84.0%
passed #166421
macosx
build_macosx_36

00:21:11

84.0%
failed #166420
docker
build_linux_36

00:09:48