Function nom::line_ending

pub fn line_ending<T>(input: T) -> IResult<T, T> where T: Slice<Range<usize>> + Slice<RangeFrom<usize>> + Slice<RangeTo<usize>>,
        T: InputIter + InputLength,
        T: Compare<&'static str>

Recognizes lowercase and uppercase alphabetic characters: a-zA-Z