patch 9.0.2013: confusing ifdefs in if_<lang>.c Commit: https://github.com/vim/vim/commit/c97b3febc82c1ccacf5f328ed0bd81c8b850e97d Author: Ken Takata <kentkt@csc.jp> Date: Wed Oct 11 21:27:06 2023 +0200 patch 9.0.2013: confusing ifdefs in if_<lang>.c Problem: confusing ifdefs in if_<lang>.c Solution: refactor ifndefs to #ifdefs if_x: Avoid using #ifndef - #else - #endif Using #ifndef - #else - #endif is sometimes confusing. Use #ifdef - #else - #endif instead. closes: #13310 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Ken Takata <kentkt@csc.jp>