Merge pull request #1680 from gurjeet/patch-1

Fix comment to mention the correct type of error

src/primitives/array.md

@@ -63,7 +63,7 @@ fn main() {
         }
     }
 
-    // Out of bound indexing causes runtime error.
+    // Out of bound indexing causes compile-time error.
     //println!("{}", xs[5]);
 }
 ```