ci(clippy): fix new default warn empty_line_after_doc_comments for rust 1.83

https://rust-lang.github.io/rust-clippy/master/index.html#empty_line_after_doc_comments
rust-lang/rust-clippy#13091

Author: notmandatory

crates/wallet/examples/compiler.rs

@@ -30,7 +30,6 @@ use bdk_wallet::{KeychainKind, Wallet};
 /// can be derived from the policy.
 ///
 /// This example demonstrates the interaction between a bdk wallet and miniscript policy.
-
 #[allow(clippy::print_stdout)]
 fn main() -> Result<(), Box<dyn Error>> {
     // We start with a miniscript policy string

crates/wallet/examples/policy.rs

@@ -25,7 +25,6 @@ use bdk_wallet::signer::SignersContainer;
 ///
 /// This example demos a Policy output for a 2of2 multisig between between 2 parties, where the wallet holds
 /// one of the Extend Private key.
-
 #[allow(clippy::print_stdout)]
 fn main() -> Result<(), Box<dyn Error>> {
     let secp = bitcoin::secp256k1::Secp256k1::new();

crates/wallet/src/keys/mod.rs

@@ -982,7 +982,7 @@ impl fmt::Display for KeyError {
 impl std::error::Error for KeyError {}
 
 #[cfg(test)]
-pub mod test {
+mod test {
     use bitcoin::bip32;
 
     use super::*;