Merge #3880 Correctly print cmdline errors with braces #1256

Job	Run time
build_NetCore (Debug_NetCore)	50s
build_NetCore (Release_NetCore)	1m 0s
build (6.8, Debug)	1m 27s
build (6.8, Release)	2m 35s
build (6.10, Debug)	1m 49s
build (6.10, Release)	1m 49s
build (6.12, Debug)	1m 27s
build (6.12, Release)	1m 25s
build (latest, Debug)	1m 53s
build (latest, Release)	2m 32s
	16m 47s

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