The wrong example for "Branches".
Added option parameters in protect branch section.
Here is reason: https://gitlab.com/gitlab-org/gitlab-ee/commit/3ab07b8aae8dae43cfa3aae1306c59ea264a8594

Maybe this section could/should be deleted. Because in file repositories.md it had been deleted:  https://gitlab.com/gitlab-org/gitlab-ee/commit/8f3701eff005aeedcebff8ce02074f5056a369b3