Apply suggestions from code review

Co-authored-by: Charles Cooper <cooper.charles.m@gmail.com>

tests/functional/codegen/features/test_logging.py

@@ -1255,6 +1255,7 @@ def foo():
 
 
 valid_list = [
+    # test constant folding inside raw_log
     """
 topic: constant(bytes32) = 0x1212121212121210212801291212121212121210121212121212121212121212
 

tests/functional/syntax/exceptions/test_invalid_literal_exception.py

@@ -36,6 +36,7 @@ def foo():
 def foo():
     a: bytes32 = keccak256("ѓtest")
     """,
+    # test constant folding inside of `convert()`
     """
 BAR: constant(uint16) = 256
 

tests/functional/syntax/exceptions/test_type_mismatch_exception.py

@@ -47,6 +47,7 @@ def foo():
     """
 a: constant(address) = 0x3cd751e6b0078be393132286c442345e5dc49699
     """,
+    # test constant folding inside `convert()`
     """
 BAR: constant(Bytes[5]) = b"vyper"
 

tests/functional/syntax/test_slice.py

@@ -53,6 +53,7 @@ def foo(inp: Bytes[10]) -> Bytes[4]:
 def foo() -> Bytes[10]:
     return slice(b"badmintonzzz", 1, 10)
     """,
+    # test constant folding for `slice()` `length` argument
     """
 @external
 def foo():