Fix documentation by explicitly dropping connection

src/lib.rs

@@ -79,7 +79,7 @@
 //!     ).await?;
 //!
 //!     // Dropped connection will go to the pool
-//!     conn;
+//!     drop(conn);
 //!
 //!     // Pool must be disconnected explicitly because
 //!     // it's an asynchronous operation.

src/local_infile_handler/mod.rs

@@ -64,7 +64,7 @@ pub mod builtin;
 /// assert_eq!(result.len(), 1);
 /// assert_eq!(result[0], "foobar");
 ///
-/// conn; // dropped connection will go to the pool
+/// drop(conn); // dropped connection will go to the pool
 ///
 /// pool.disconnect().await?;
 /// # Ok(())