doc improvement

src/scripting/StelMainScriptAPI.hpp

@@ -814,7 +814,7 @@ public slots:
 	//! time is moving backwards, the function will return immediately.
 	//! If the time rate is 0, the function will not wait.  This is to
 	//! prevent infinite wait time.
-	//! @param dt the date string to use
+	//! @param dt the date string to use, format like "2012:06:06T4:44:00" or "-1428:03:04T22:23:45"
 	//! @param spec "local" or "utc"
 	void waitFor(const QString& dt, const QString& spec="utc");