Fix edit tool diff rendering (#601) #6439

Job	Run time
build-and-check	3m 7s
test-integration-packages/billing	1m 1s
test-integration-packages/internal	1m 7s
test-integration-sdk	1m 16s
test-integration-common	51s
test-integration-web	50s
test-integration-packages/agent-runtime	42s
test-sdk	48s
test-.agents	40s
test-common	39s
test-packages/billing	39s
test-packages/agent-runtime	42s
test-web	1m 17s
test-integration-cli	42s
test-packages/internal	47s
test-cli	56s
	16m 4s

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