Miss __; in vec.rs

[IvanaGyro]

rust-koans/src/koans/vec.rs

Lines 160 to 172 in c6e8193

	// Reversing a Vec is pretty easy in Rust
	#[test]
	fn reverse_vecs() {
	let mut vector = vec![1, 2, 3];
	assert_eq!(vector.first(), Some(&3));
	}
	// You can also just swap two elements in a Vec
	#[test]
	fn trading_spaces() {
	let mut vector = vec![false, true];
	assert_eq!(vector.first(), Some(&true));
	}

Maybe, the tests above will be better if there are hint lines as below.

 // Reversing a Vec is pretty easy in Rust 
 #[test] 
 fn reverse_vecs() { 
     let mut vector = vec![1, 2, 3]; 
     __;
     assert_eq!(vector.first(), Some(&3)); 
 } 

 // You can also just swap two elements in a Vec 
 #[test] 
 fn trading_spaces() { 
     let mut vector = vec![false, true]; 
     __;
     assert_eq!(vector.first(), Some(&true)); 
 }