Improve comments

ethereum/circuits/lib/src/misc/arrays.nr

@@ -32,7 +32,7 @@ pub(crate) fn memcpy_up_to_length<TItem, SRC_LEN, DEST_LEN>(dest: &mut [TItem; D
     }
 }
 
-// Fills destination array with content of source array starting from the starting position.
+// Fills destination array with content of source array starting from the offset in source array.
 pub(crate) fn memcpy<TItem, SRC_LEN, DEST_LEN>(dest: &mut [TItem; DEST_LEN], src: [TItem; SRC_LEN], offset: u64) {
     memcpy_up_to_length(dest, src, offset, DEST_LEN);
 }

ethereum/circuits/lib/src/misc/bytes.nr

@@ -71,7 +71,6 @@ pub fn shift_right_by_one<N>(arr: &mut [u8; N]) {
     }
 }
 
-// Left-shift the byte array
 pub(crate) fn left_byte_shift<N>(input: [u8; N], n: u64) -> [u8; N] {
     let mut out = [0; N];
 

ethereum/circuits/lib/src/rlp/decode.nr

@@ -3,7 +3,7 @@ use crate::rlp::types::{RlpList, RlpFragment, RlpHeader, STRING, LIST};
 use crate::misc::fragment::Fragment;
 
 // Maximum number of bytes required to represent entity length.
-// This means that this library can only decode RLP entities with a length of up to 2^16 bytes.
+// This means that this library can only decode RLP entities with a length of up to 2^16 - 1 bytes.
 global MAX_LEN_IN_BYTES: u64 = 2;
 
 pub fn extract_payload_len<N>(data: Fragment<N, u8>, lenlen: u64) -> u64 {