Rename {NonZero,Shared,Unique}::new to new_unchecked

src/test/run-pass/issue-23433.rs

@@ -16,7 +16,7 @@ use std::ptr::Unique;
 
 fn main() {
     let mut a = [0u8; 5];
-    let b: Option<Unique<[u8]>> = unsafe { Some(Unique::new(&mut a)) };
+    let b: Option<Unique<[u8]>> = unsafe { Some(Unique::new_unchecked(&mut a)) };
     match b {
         Some(_) => println!("Got `Some`"),
         None => panic!("Unexpected `None`"),

src/test/ui/print_type_sizes/nullable.rs

@@ -57,7 +57,7 @@ pub struct NestedNonZero<T: Zeroable> {
 impl<T: Zeroable+Default> Default for NestedNonZero<T> {
     fn default() -> Self {
         unsafe {
-            NestedNonZero { pre: 0, val: NonZero::new(Default::default()), post: 0 }
+            NestedNonZero { pre: 0, val: NonZero::new_unchecked(Default::default()), post: 0 }
         }
     }
 }