Update samples/custom-structures-client/src/main.rs

Co-authored-by: Sander van Harmelen <[email protected]>

samples/custom-structures-client/src/main.rs

@@ -141,7 +141,7 @@ async fn read_structure_var(session: &Arc<Session>, ns: u16) -> Result<(), Statu
 }
 
 // The struct and enum code after this line could/should be shared with demo server,
-// but having it here make the example selv contained
+// but having it here makes the example self-contained.
 
 #[derive(
     Debug,