Tweak tests for references

Author: novacrazy

tests/mod.rs

@@ -156,7 +156,8 @@ fn test_zip() {
     let a: GenericArray<_, U4> = GenericArray::generate(|i| i + 1);
     let b: GenericArray<_, U4> = GenericArray::generate(|i| i as i32 * 4);
 
-    let c = (&a).zip(&b, |r, l| *r as i32 + l);
+    // Uses reference and non-reference arguments
+    let c = (&a).zip(b, |r, l| *r as i32 + l);
 
     assert_eq!(c, arr![i32; 1, 6, 11, 16]);
 }

tests/std.rs

@@ -12,10 +12,10 @@ use generic_array::functional::*;
 
 pub fn test_generic<S>(s: S)
     where
-        S: FunctionalSequence<i32>,
-        SequenceItem<S>: Add<i32, Output=i32>,
-        S: MappedGenericSequence<i32, i32>,
-        MappedSequence<S, i32, i32>: Debug
+        S: FunctionalSequence<i32>,            // `.map`
+        SequenceItem<S>: Add<i32, Output=i32>, // `+`
+        S: MappedGenericSequence<i32, i32>,    // `i32` -> `i32`
+        MappedSequence<S, i32, i32>: Debug     // println!
 {
     let a = s.map(|x| x + 1);