feat: refence mutable and immutable ref at a time

Author: AbdulxaqDev

notes.txt

@@ -268,7 +268,11 @@
 
     println!("{}, {}", r1, r2);    
 
+ the same rule applies for mutable and imutable references at a time:
+    let mut s = String::from("Brendan");
 
+    let r1 = &s;
+    let r2 = &mut s;
 
 
 

projects/ownership/src/main.rs

@@ -1,7 +1,7 @@
 fn main() {
     let mut s = String::from("Brendan");
 
-    let r1 = &mut s;
+    let r1 = &s;
     let r2 = &mut s;
 
     println!("{}, {}", r1, r2);