formatDates *1.3* ================= Formats a date range (two Date objects) into a string.
$.fullCalendar.formatDates( *date1*, *date2*, *formatString* [, *options* ] ) -> String
`formatDates` uses all the commands from [formatDate](), but with two special forms: `{...}` : switches to formatting the 2nd date `[...]` : only displays the enclosed format if the current date is different from the alternate date in the same regards