fix: edge cases empty codeblock (#4061) #4450

Job	Run time
test-on-macos	14m 24s
base_branch_cov	2m 26s
test-on-macos-pr-target	0s
test-on-ubuntu	12m 3s
test-on-ubuntu-pr-target	0s
test-on-windows (mcafee)	21m 56s
test-on-windows (default-windows-security)	1h 9m 58s
test-on-windows (bit-defender)	42m 15s
test-on-windows-pr	0s
test-on-windows-pr-target	0s
coverage-check	11m 58s
	2h 55m 0s

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