Grammatical corrections in eth-types (#1708)

Hello I am learning web3 programming, I went through some of the code
because I was told zk is fascinating (and it is). I found some little
errors in comments, nothing important. I hope you don't mind opening a
PR for such a little thing, I read the contributing file and didn't find
it being forbidden, but even if it is little I hope i'll help you even
just a bit in your research. Thank you for making that repo public. Have
a nice day.

eth-types/src/evm_types/memory.rs

@@ -293,7 +293,7 @@ impl Memory {
     }
 
     /// Reads an entire [`Word`] which starts at the provided [`MemoryAddress`]
-    /// `addr` and finnishes at `addr + 32`.
+    /// `addr` and finishes at `addr + 32`.
     pub fn read_word(&self, addr: MemoryAddress) -> Word {
         Word::from_big_endian(&self.read_chunk(addr, MemoryAddress::from(32)))
     }
@@ -359,7 +359,7 @@ impl Memory {
 
     /// Copy source data to memory. Used in (ext)codecopy/calldatacopy.
     pub fn copy_from(&mut self, dst_offset: Word, src_offset: Word, length: Word, data: &[u8]) {
-        // Reference go-ethereum `opCallDataCopy` function for defails.
+        // Reference go-ethereum `opCallDataCopy` function for details.
         // https://github.com/ethereum/go-ethereum/blob/bb4ac2d396de254898a5f44b1ea2086bfe5bd193/core/vm/instructions.go#L299
 
         // `length` should be checked for overflow during gas cost calculation.

eth-types/src/evm_types/opcode_ids.rs

@@ -676,7 +676,7 @@ impl OpcodeId {
         let (min_stack_ptr, max_stack_ptr): (u32, u32) = match self {
             // `min_stack_pointer` 0 means stack overflow never happen, for example, `OpcodeId::ADD`
             // can only encounter underflow error, but never encounter overflow error.
-            // `max_stack_pointer` means max stack poniter for op code normally run. for example,
+            // `max_stack_pointer` means max stack pointer for op code normally run. for example,
             // `OpcodeId::ADD` 's max stack pointer is 1022, when actual sp > 1022, will
             // encounter underflow error.
             OpcodeId::STOP => (0, 1024),

eth-types/src/sign_types.rs

@@ -36,7 +36,7 @@ pub fn sign(
     let mut x_bytes = [0u8; 64];
     x_bytes[..32].copy_from_slice(&x_repr[..]);
 
-    let sig_r = secp256k1::Fq::from_uniform_bytes(&x_bytes); // get x cordinate (E::Base) on E::Scalar
+    let sig_r = secp256k1::Fq::from_uniform_bytes(&x_bytes); // get x coordinate (E::Base) on E::Scalar
     let sig_s = randomness_inv * (msg_hash + sig_r * sk);
     (sig_r, sig_s)
 }