format Omer
Returns a String of the Omer day in the form ל״ג בעומר if Hebrew Format is set, or "Omer X" or "Lag B'Omer" if not. An empty string if there is no Omer this day.
Return
a String of the Omer day in the form or an empty string if there is no Omer this day. The default formatting has a ב׳ prefix that would output בעומר, but this can be set via the hebrewOmerPrefix method to use a ל and output ל״ג לעומר.
Parameters
jewish Calendar
the JewishCalendar to be formatted