chore: remove redundant words in comment (#9015)

Signed-off-by: pinglanlu <pinglanlu@outlook.com>

book/src/user/shielded-scan-grpc-server.md

@@ -65,7 +65,7 @@ scanner.Scanner.GetResults
 scanner.Scanner.RegisterKeys
 ```
 
-To see the the request and response types for a method, for example the `GetResults` method, try:
+To see the request and response types for a method, for example the `GetResults` method, try:
 
 
 ```bash

zebra-network/src/meta_addr/tests/check.rs

@@ -67,7 +67,7 @@ pub(crate) fn sanitize_avoids_leaks(original: &MetaAddr, sanitized: &MetaAddr) {
 
     // check the other fields
 
-    // Sanitize to the the default state, even though it's not serialized
+    // Sanitize to the default state, even though it's not serialized
     assert_eq!(sanitized.last_connection_state, Default::default());
     // Sanitize to known flags
     let sanitized_peer_services =

zebrad/src/components/mempool/tests/vector.rs

@@ -888,7 +888,7 @@ async fn mempool_reverifies_after_tip_change() -> Result<(), Report> {
         .await;
 
     // Push block 2 to the state. This will increase the tip height past the expected
-    // tip height that the the tx was verified at.
+    // tip height that the tx was verified at.
     state_service
         .ready()
         .await

zebrad/tests/acceptance.rs

@@ -2555,7 +2555,7 @@ async fn submit_block() -> Result<()> {
     common::get_block_template_rpcs::submit_block::run().await
 }
 
-/// Check that the the end of support code is called at least once.
+/// Check that the end of support code is called at least once.
 #[test]
 fn end_of_support_is_checked_at_start() -> Result<()> {
     let _init_guard = zebra_test::init();
@@ -3474,7 +3474,7 @@ async fn nu6_funding_streams_and_coinbase_balance() -> Result<()> {
         "invalid block with excessive coinbase output value should be rejected"
     );
 
-    // Use an invalid coinbase transaction (with an output value less than than the `block_subsidy + miner_fees - expected_lockbox_funding_stream`)
+    // Use an invalid coinbase transaction (with an output value less than the `block_subsidy + miner_fees - expected_lockbox_funding_stream`)
     let network = base_network_params
         .clone()
         .with_post_nu6_funding_streams(ConfiguredFundingStreams {

zebrad/tests/end_of_support.rs

@@ -68,7 +68,7 @@ fn end_of_support_date() {
     ));
 }
 
-/// Check that the the end of support task is working.
+/// Check that the end of support task is working.
 #[tokio::test]
 #[tracing_test::traced_test]
 async fn end_of_support_task() -> Result<()> {