chore: fix some typos

Signed-off-by: yangquanshi <[email protected]>

slashing/program/src/duplicate_block_proof.rs

@@ -48,7 +48,7 @@ impl<'a> SlashingProofData<'a> for DuplicateBlockProofData<'a> {
     fn verify_proof(self, slot: Slot, _node_pubkey: &Pubkey) -> Result<(), SlashingError> {
         // TODO: verify through instruction inspection that the shreds were sigverified
         // earlier in this transaction.
-        // Ed25519 Singature verification is performed on the merkle root:
+        // Ed25519 Signature verification is performed on the merkle root:
         // node_pubkey.verify_strict(merkle_root, signature).
         // We will verify that the pubkey merkle root and signature match the shred and
         // that the verification was successful.
@@ -721,7 +721,7 @@ mod tests {
 
     #[test]
     fn test_retransmitter_signature_payload_proof_invalid() {
-        // TODO: change visbility of shred::layout::set_retransmitter_signature.
+        // TODO: change visibility of shred::layout::set_retransmitter_signature.
         // Hardcode offsets for now;
         const DATA_SHRED_OFFSET: usize = 1139;
         const CODING_SHRED_OFFSET: usize = 1164;

token/program-2022/src/extension/confidential_mint_burn/instruction.rs

@@ -421,7 +421,7 @@ pub fn confidential_mint_with_split_proofs(
 ) -> Result<Vec<Instruction>, ProgramError> {
     check_program_account(token_program_id)?;
     let mut accounts = vec![AccountMeta::new(*token_account, false)];
-    // we only need write lock to adjust confidential suppy on
+    // we only need write lock to adjust confidential supply on
     // mint if a value for supply_elgamal_pubkey has been set
     if supply_elgamal_pubkey.is_some() {
         accounts.push(AccountMeta::new(*mint, false));