rust: samples: add missing newline to pr_info! calls in rust_print_main

Fixes: f431c5c ("samples: rust: print: Add sample code for Arc printing")
Reported-by: Miguel Ojeda <[email protected]>
Closes: Rust-for-Linux#1139
Signed-off-by: Alban Kurti <[email protected]>

Author: albankurti

samples/rust/rust_print_main.rs

@@ -23,10 +23,10 @@ fn arc_print() -> Result {
     let b = UniqueArc::new("hello, world", GFP_KERNEL)?;
 
     // Prints the value of data in `a`.
-    pr_info!("{}", a);
+    pr_info!("{}\n", a);
 
     // Uses ":?" to print debug fmt of `b`.
-    pr_info!("{:?}", b);
+    pr_info!("{:?}\n", b);
 
     let a: Arc<&str> = b.into();
     let c = a.clone();
@@ -53,7 +53,7 @@ fn arc_print() -> Result {
     }
 
     // Pretty-prints the debug formatting with lower-case hexadecimal integers.
-    pr_info!("{:#x?}", a);
+    pr_info!("{:#x?}\n", a);
 
     Ok(())
 }