style: remove trailing whitespace in main.rs

Author: SharanRP

example-crates/example_wallet_rpc/src/main.rs

@@ -12,7 +12,7 @@ use serde_json::json;
 use std::{path::PathBuf, sync::mpsc::sync_channel, thread::spawn, time::Instant};
 
 const DB_MAGIC: &str = "bdk-rpc-wallet-example";
- 
+
 /// Bitcoind RPC example using `bdk_wallet::Wallet`.
 ///
 /// This syncs the chain block-by-block and prints the current balance, transaction count and UTXO