[doc] Fix buildout code-block guesses

4 jobs for doc-fix in 8 minutes and 44 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #183707
docker
build_linux_36

00:02:39

74.0%
passed #183708
docker
build_linux_37

00:02:37

74.0%
passed #183705
macosx
build_macosx_36

00:07:12

74.0%
passed #183706
macosx
build_macosx_37

00:08:43

74.0%