fix a few sphinx-reported errors
fix a few sphinx-reported errors

ehealthafrica-ci/rapidsms,caktus/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,lsgunth/rapidsms,catalpainternational/rapidsms,peterayeni/rapidsms,caktus/rapidsms,catalpainternational/rapidsms,catalpainternational/rapidsms,eHealthAfrica/rapidsms,ehealthafrica-ci/rapidsms,peterayeni/rapidsms,eHealthAfrica/rapidsms,caktus/rapidsms,lsgunth/rapidsms,lsgunth/rapidsms,peterayeni/rapidsms,ehealthafrica-ci/rapidsms,lsgunth/rapidsms,eHealthAfrica/rapidsms