Fix preserving the commit message when description contains blank lin… #5140

Job	Run time
Integration Tests - git 2.20.0	1m 12s
check-codebase	21s
build	1m 1s
Integration Tests - git 2.22.5	1m 13s
ci - ubuntu-latest	45s
ci - windows-latest	2m 8s
Integration Tests - git 2.23.0	55s
Integration Tests - git 2.25.1	58s
Integration Tests - git 2.30.8	1m 17s
Integration Tests - git latest	50s
check-required-label	0s
lint	31s
upload-coverage	22s
	11m 33s

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