public String listWikis() {
		String list = "Available wikis: ";
		Set<String> wikiNames = this.wikis.keySet();
		
		if (wikiNames.isEmpty()) {
			return "(No wikis are available right now.)";
		}
		
		for (String wikiName : this.wikis.keySet()) {
			list += wikiName + ", ";
		}
		
		return list.substring(0, list.length() - 2);
	}