while: Behaviour change in condition evaluation

Sample project

cmake_minimum_required(VERSION 3.16)
project(proj)

set(var_with_paren "(")
set(some_list "")

#if(NOT ${var_with_paren} IN_LIST some_list)
    #message("var not in some_list")
#else()
    #message("var in some_list")
#endif()

while(NOT ${var_with_paren} IN_LIST some_list)
    break()
endwhile()

Configuring with cmake 3.21 succeeds.

Configuring with master / 3.22 fails with

CMake Error at CMakeLists.txt:13 (while):
  had incorrect arguments: NOT ${var_with_paren} IN_LIST some_list
  (mismatched parenthesis in condition).

If you uncomment the if code block, it fails both with 3.21 and master.

The MR causing this is !6392 (merged)

The new behavior is now more consistent with if.

Don't know if it's an acceptable breakage for old project code though.