Update EIP-7702: Clarify that CODE* operations work on executable code

Author: Andrei Maiboroda

EIPS/eip-7702.md

@@ -90,6 +90,8 @@ The delegation designation uses the banned opcode `0xef` from [EIP-3541](./eip-3
 
 For example, `EXTCODESIZE` would return `2` (the size of `0xef01`) instead of `23` which would represent the delegation designation, `EXTCODEHASH` would return `0xeadcdba66a79ab5dce91622d1d75c8cff5cff0b96944c3bf1072cd08ce018329` (`keccak256(0xef01)`), and `CALL` would load the code from `address` and execute it in the context of `authority`.
 
+`CODESIZE` and `CODECOPY` operations operate on executable code, as before. *Note that in a delegated execution `CODESIZE` and `CODECOPY` produce different result comparing to `EXTCODESIZE` and `EXTCODECOPY` of execution target.*
+
 In case a delegation designator points to a precompile address, retrieved code is considered empty and `CALL`, `CALLCODE`, `STATICCALL`, `DELEGATECALL` instructions targeting this account will execute empty code, i.e. succeed with no execution given enough gas.
 
 In case a delegation designator points to another designator, creating a potential chain or loop of designators, clients must retrieve only the first code and then stop following the designator chain.