Function combine::char::spaces

pub fn spaces<I>() -> Spaces<I> where
    I: Stream<Item = char>, 

Skips over zero or more spaces according to std::char::is_whitespace.

This includes space characters, tabs and newlines.

use combine::Parser;
use combine::char::spaces;
assert_eq!(spaces().parse(""), Ok(((), "")));
assert_eq!(spaces().parse("   "), Ok(((), "")));