Function parse_annotated_year_month 

pub(crate) fn parse_annotated_year_month<'a, T: EncodingType>(
    cursor: &mut Cursor<'a, T>,
    handler: impl FnMut(Annotation<'a, T>) -> Option<Annotation<'a, T>>,
) -> ParserResult<IxdtfParseRecord<'a, T>>

Parse an annotated YearMonth