Fix the sphinx warnings

12 jobs for flat in 8 minutes and 21 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #107878
conda-linux
build_linux_27

00:02:33

passed #107879
conda-linux
build_linux_35

00:02:57

passed #107880
conda-linux
build_linux_36

00:02:34

passed #107881
conda-macosx
build_macosx_27

00:04:07

passed #107882
conda-macosx
build_macosx_35

00:04:00

passed #107883
conda-macosx
build_macosx_36

00:03:59

 
  Test
passed #107884
conda-linux
test_linux_27

00:02:39

passed #107885
conda-linux
test_linux_35

00:02:57

passed #107886
conda-linux
test_linux_36

00:02:08

passed #107887
conda-macosx
test_macosx_27

00:03:42

passed #107888
conda-macosx
test_macosx_35

00:03:41

passed #107889
conda-macosx
test_macosx_36

00:03:13