Fix edit tool diff rendering #6438

Job	Run time
build-and-check	3m 6s
test-integration-packages/internal	1m 7s
test-integration-packages/billing	1m 1s
test-integration-common	51s
test-integration-cli	42s
test-integration-web	47s
test-integration-packages/agent-runtime	49s
test-.agents	42s
test-cli	1m 1s
test-packages/billing	45s
test-common	51s
test-sdk	39s
test-packages/internal	47s
test-integration-sdk	1m 19s
test-web	1m 8s
test-packages/agent-runtime	51s
	16m 26s

Provide feedback