feat(defaults): unimpaired empty line below/above cursor #30984 #690

Job	Run time
clang-analyzer	10m 4s
build-types	3m 25s
lint	3m 14s
ubuntu asan clang unittest	2m 26s
with-external-deps	1m 10s
ubuntu asan clang functionaltest	15m 17s
ubuntu asan clang oldtest	7m 5s
ubuntu tsan clang functionaltest	15m 55s
ubuntu gcc unittest	1m 41s
ubuntu gcc functionaltest	6m 46s
ubuntu gcc oldtest	3m 54s
macos intel clang unittest	4m 21s
macos intel clang functionaltest	10m 55s
macos intel clang oldtest	6m 35s
macos arm clang unittest	1m 49s
macos arm clang functionaltest	7m 48s
macos arm clang oldtest	4m 23s
ubuntu puc-lua gcc functionaltest	7m 54s
ubuntu puc-lua gcc oldtest	3m 28s
windows / windows (functional)	13m 19s
windows / windows (old)	6m 48s
	2h 18m 17s

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