Apply suggestions from code review

Co-authored-by: Jon C <[email protected]>

Author: samkim-crypto

token/confidential-transfer/proof-extraction/src/errors.rs

@@ -8,7 +8,7 @@ pub enum TokenProofExtractionError {
     PedersenCommitmentMismatch,
     #[error("Range proof length mismatch")]
     RangeProofLengthMismatch,
-    #[error("Fee pparameters mismatch")]
+    #[error("Fee parameters mismatch")]
     FeeParametersMismatch,
     #[error("Curve arithmetic failed")]
     CurveArithmetic,

token/confidential-transfer/proof-generation/src/transfer_with_fee.rs

@@ -309,7 +309,7 @@ fn calculate_fee(transfer_amount: u64, fee_rate_basis_points: u16) -> Option<(u6
 
     // Warning: Division may involve CPU opcodes that have variable execution times.
     // This non-constant-time execution of the fee calculation can theoretically
-    // reveal information about the transfer amount. For transfers that invole
+    // reveal information about the transfer amount. For transfers that involve
     // extremely sensitive data, additional care should be put into how the fees
     // are calculated.
     let fee = numerator