Rust BPF program cleanup (#7990)

programs/bpf/rust/alloc/src/lib.rs

@@ -3,10 +3,8 @@
 #[macro_use]
 extern crate alloc;
 extern crate solana_sdk;
-use solana_sdk::entrypoint::SUCCESS;
-use solana_sdk::info;
-use std::alloc::Layout;
-use std::mem;
+use solana_sdk::{entrypoint::SUCCESS, info};
+use std::{alloc::Layout, mem};
 
 #[no_mangle]
 pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
@@ -22,7 +20,7 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
     }
 
     unsafe {
-        // Test modest allocation and deallocation
+        // Test modest allocation and de-allocation
 
         let layout = Layout::from_size_align(100, mem::align_of::<u8>()).unwrap();
         let ptr = alloc::alloc::alloc(layout);

programs/bpf/rust/dup_accounts/src/lib.rs

@@ -8,7 +8,7 @@ use solana_sdk::{
 entrypoint!(process_instruction);
 fn process_instruction(
     _program_id: &Pubkey,
-    accounts: &mut [AccountInfo],
+    accounts: &[AccountInfo],
     instruction_data: &[u8],
 ) -> u32 {
     const FAILURE: u32 = 1;

programs/bpf/rust/external_spend/src/lib.rs

@@ -6,7 +6,7 @@ use solana_sdk::{account_info::AccountInfo, entrypoint, entrypoint::SUCCESS, pub
 entrypoint!(process_instruction);
 fn process_instruction(
     _program_id: &Pubkey,
-    accounts: &mut [AccountInfo],
+    accounts: &[AccountInfo],
     _instruction_data: &[u8],
 ) -> u32 {
     // account 0 is the mint and not owned by this program, any debit of its lamports

programs/bpf/rust/iter/src/lib.rs

@@ -1,8 +1,7 @@
 //! @brief Example Rust-based BPF program tests loop iteration
 
 extern crate solana_sdk;
-use solana_sdk::entrypoint::SUCCESS;
-use solana_sdk::info;
+use solana_sdk::{entrypoint::SUCCESS, info};
 
 #[no_mangle]
 pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
@@ -22,7 +21,7 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pulls in the stubs requried for `info!()`
+    // Pulls in the stubs required for `info!()`
     solana_sdk_bpf_test::stubs!();
 
     #[test]

programs/bpf/rust/many_args/src/lib.rs

@@ -2,8 +2,7 @@
 
 mod helper;
 extern crate solana_sdk;
-use solana_sdk::entrypoint::SUCCESS;
-use solana_sdk::info;
+use solana_sdk::{entrypoint::SUCCESS, info};
 
 #[no_mangle]
 pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
@@ -30,7 +29,7 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pulls in the stubs requried for `info!()`
+    // Pulls in the stubs required for `info!()`
     solana_sdk_bpf_test::stubs!();
 
     #[test]

programs/bpf/rust/many_args_dep/src/lib.rs

@@ -51,7 +51,7 @@ pub fn many_args_sret(
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pulls in the stubs requried for `info!()`
+    // Pulls in the stubs required for `info!()`
     solana_sdk_bpf_test::stubs!();
 
     #[test]

programs/bpf/rust/noop/src/lib.rs

@@ -22,7 +22,7 @@ fn return_sstruct() -> SStruct {
 entrypoint!(process_instruction);
 fn process_instruction(
     program_id: &Pubkey,
-    accounts: &mut [AccountInfo],
+    accounts: &[AccountInfo],
     instruction_data: &[u8],
 ) -> u32 {
     info!("Program identifier:");

programs/bpf/rust/param_passing/src/lib.rs

@@ -2,8 +2,7 @@
 
 extern crate solana_sdk;
 use solana_bpf_rust_param_passing_dep::{Data, TestDep};
-use solana_sdk::entrypoint::SUCCESS;
-use solana_sdk::info;
+use solana_sdk::{entrypoint::SUCCESS, info};
 
 #[no_mangle]
 pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
@@ -27,7 +26,7 @@ pub extern "C" fn entrypoint(_input: *mut u8) -> u32 {
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pulls in the stubs requried for `info!()`
+    // Pulls in the stubs required for `info!()`
     solana_sdk_bpf_test::stubs!();
 
     #[test]

programs/bpf/rust/param_passing_dep/src/lib.rs

@@ -27,7 +27,7 @@ impl<'a> TestDep {
 #[cfg(test)]
 mod test {
     use super::*;
-    // Pulls in the stubs requried for `info!()`
+    // Pulls in the stubs required for `info!()`
     solana_sdk_bpf_test::stubs!();
 
     #[test]

programs/bpf/rust/sysval/src/lib.rs

@@ -19,7 +19,7 @@ use solana_sdk::{
 entrypoint!(process_instruction);
 fn process_instruction(
     _program_id: &Pubkey,
-    accounts: &mut [AccountInfo],
+    accounts: &[AccountInfo],
     _instruction_data: &[u8],
 ) -> u32 {
     // Clock