# select `simple` theme
# change `index.tpl` of this theme - add `placeholder_label="la_Yes"` attribute to `<inp2:st_ContentBlock num="1"/>` tag in this file
# go to {nav Website & Content > Browse Website}, click on `Content Mode` tab, edit content block - delete all it's content, save
# confirm that on page in `Content Mode` placeholder `Yes` is shown
# go to {nav Configuration > Website > Advanced} section, enable `Revision Control for Section Content` option there
# go to {nav Website & Content > Browse Website}, create and publish new page revision by changing content block #2, leaving content block #1 empty
# confirm that on page in `Content Mode` placeholder `Yes` is shown also in new revision