rollup merge of #23886: demelev/remove_as_slice_usage

src/librand/chacha.rs

@@ -198,7 +198,7 @@ impl Rand for ChaChaRng {
         for word in &mut key {
             *word = other.gen();
         }
-        SeedableRng::from_seed(key.as_slice())
+        SeedableRng::from_seed(&key[..])
     }
 }
 

src/librand/lib.rs

@@ -154,7 +154,7 @@ pub trait Rng : Sized {
     ///
     /// let mut v = [0; 13579];
     /// thread_rng().fill_bytes(&mut v);
-    /// println!("{:?}", v.as_slice());
+    /// println!("{:?}", v);
     /// ```
     fn fill_bytes(&mut self, dest: &mut [u8]) {
         // this could, in theory, be done by transmuting dest to a
@@ -310,9 +310,9 @@ pub trait Rng : Sized {
     /// let mut rng = thread_rng();
     /// let mut y = [1, 2, 3];
     /// rng.shuffle(&mut y);
-    /// println!("{:?}", y.as_slice());
+    /// println!("{:?}", y);
     /// rng.shuffle(&mut y);
-    /// println!("{:?}", y.as_slice());
+    /// println!("{:?}", y);
     /// ```
     fn shuffle<T>(&mut self, values: &mut [T]) {
         let mut i = values.len();