I should be able to convert this post to wiki once created.
However normal users may also make their post Wiki, provided their trust level is high enough (by default TL3).
edit: Now it should be converted to a wiki post, TL1+ users can edit this.
edit2: just to check the edit history.
edit3: waited longer than 5 to edit, just to check it this create a edit history now.
edit4: Wiking stuff test «^‿^»