Minor fixes (#25059)

1) Examples: Remove double space between "option:" and "value"
2) Documentation: Fix rendering usses
3) Documentation: Remove `required: true` to match argspec

lib/ansible/modules/network/cloudengine/ce_reboot.py

@@ -33,7 +33,6 @@ options:
     confirm:
         description:
             - Safeguard boolean. Set to true if you're sure you want to reboot.
-        required: true
         type: bool
         default: false
     save_config: