fix completion behavior of `affine_on` #2856

Job	Run time
CPU (Windows) (msvc, Debug)	11m 19s
macos-CPU (MacOS) (clang, Debug)	3m 57s
CPU (Windows) (msvc, Release)	14m 52s
macos-CPU (MacOS) (clang, Release)	3m 30s
CPU (gcc 11, Debug)	13m 43s
CPU (clang 16, Release, ASAN)	4m 39s
CPU (clang 16, Debug, c++23)	4m 21s
CPU (gcc 14, Release, LEAK)	4m 3s
CPU (clang 16, Debug)	4m 23s
CPU (clang 16, Release)	4m 39s
CPU (gcc 14, Release, c++23)	4m 29s
CPU (gcc 13, Debug)	3m 57s
CPU (gcc 11, Release)	3m 50s
CPU (gcc 12, Release, TSAN)	4m 21s
CPU (gcc 11, Release, ASAN)	4m 43s
CI (CPU) (MacOS)	5s
CI (CPU)	2s
CI (CPU) (Windows)	8s
	1h 31m 1s

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