chore: fix clippy warnings for diesel example

examples/diesel/src/db.rs

@@ -4,5 +4,6 @@ use diesel::prelude::*;
 
 pub fn establish_connection() -> PgConnection {
     let database_url = config::DATABASE_URL();
-    PgConnection::establish(database_url).expect(&format!("Error connecting to {}", database_url))
+    PgConnection::establish(database_url)
+        .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
 }

examples/diesel/src/main.rs

@@ -23,7 +23,7 @@ fn main() {
 
     println!("Displaying {} posts", posts.len());
     for post in posts {
-        print!("\n");
+        println!();
         println!("{}", post.title);
         println!("----------");
         println!("{}", post.body);